High50's Monica Porter, who dated "dangerously" for a year, shares nine top tips to help protect yourself, including: don't believe anything, be careful who you get into bed with and split the check.
If you're looking for romance through online dating, make skepticism your starting point, says Monica.
The world of online dating should be regarded as a vast pick-up joint. I know because I immersed myself in it for a year (in my late fifties), and believe me, whether I was encountering horny young men or equally horny (if less crude) older men, the ultimate aim was sex.
That doesn't mean you can't find a serious relationship, even real love, online. After all, a lot of today's married couples met on a dating site. But if that is what you are after, you must be extra wary of (pardon the expression) who you "get into bed with."
As a mature adult you'll need to employ all the healthy skepticism you've built up over the decades, because it's easy on the internet for a person to be economical with the truth, or to tell outright lies about who they are and what they're after.
Rule #1 of dating over 50: Don't believe anyone.
So, lesson number one: believe in nothing until it happens, and no one until you know them.
Emotionally, you need to construct a wall around yourself which nobody can penetrate until you believe it to be safe. People will plunder your emotions without compunction if you let them. It is up to you keep them locked up, like jewels.
Some women, in particular, leave themselves emotionally vulnerable by investing too much hope in a particular potential mate, or after physical intimacy with someone.
If you meet someone you fancy, by all means enjoy good, fun sex. But - hard-nosed as it sounds, and I can't pretend it's always easy - take the emotion out of it or you will be hurt over and over again.
If and when a deeper relationship comes along, don't worry, emotion will come flooding back.
Then there is the scamming side of online dating. Most people have heard the woeful tales of vulnerable, lonely women preyed on by men who promise them love before persuading them to stump up big bucks for a bogus medical bill or some other phony hard-luck scenario.
But it works both ways. There are also the glamorous young foreign women (often revealed to be prostitutes) who expertly manipulate an older man's vanity as an easy way into his wallet, or perhaps to gain British nationality.
Rule #2: Don't part with money.
Lesson number two: if it all sounds too wonderful to be true, that's because it's a lie. Whatever you do, don't open your wallet to a stranger, especially the ones whispering sweet nothings into your computer.
And those aren't the only online dating scams.
One middle-aged Indian gent I dined with during my dating escapades told me about the "gorgeous young blonde" of vaguely Eastern European origin who seductively chatted him up online before conning him into returning her call on an expensive "sexual services" number.
He was too embarrassed to hang up and by the time he ended it, half an hour later, he'd added $70 to his phone bill.
The poor mug had never asked himself why a sexy pouting 25-year-old would throw herself at a fifty-something divorcee.
Rule #3: Beware of profile photos.
Mind you, he hadn't been entirely honest himself. His online photo showed a younger, better looking man than the ropey, dentally challenged individual sitting opposite me in the restaurant.
It is common for dating site users to edit themselves in some way. Some purport to be single, while having a hapless spouse at home. These are usually the candidates without a profile photo. Never respond to contact from the 'faceless'.
Rule #4: Don't use sites for older people.
There are thousands of dating sites. It can be overwhelming, and tricky to choose the right one. My first few weeks online were spent in trial and error. To begin with I used a dating site designed for principally for seniors, but I would advise against this.
Think about it. It attracts the sort of people who only feel safe among their own age group. Don't cut yourself off from the young and their culture, as they help to keep you young too.
Bigger, mainstream, all-generations sites tend to be less staid and a bit more funky. Match.com and eHarmony are among the most popular, and allow you to cast a wide net.
You will meet both people who want a proper relationship and those merely in search of fun and games. Other users, irritatingly, don't seem to know what they want; they just like being in the playground.
Remember that like any other business, dating sites want your money, and they have been known to employ tricks to encourage you to sign up, such as using fake profiles of potential partners who "want to contact you".
Rule #5: Try dating apps.
OK, it's not really a rule, but another option is the dating app for your smartphone, which matches you with people in your geographical area, if you have both registered a mutual attraction. I spent a wild week or two on Tinder, meeting younger men. What good fun.
But Tinder isn't for everybody. If you are over 50 and looking for something a bit more, um, traditional, there is a new app for you, called Stitch. It's being trialled at the moment in the US and Australia.
As with Tinder, only people who like the look and sound of each other will be able to make contact. But the site is meant to be as much about finding someone for friendship and companionship, as for romance and rumpy pumpy.
Despite its frequent frustrations and disappointments, I loved my adventurous year of internet dating. I met a staggering array of people, had some good times, and learnt a lot - about myself and others.
My 'dangerous dating' was brought to an abrupt end due to an unexpected turn of events and in any case I was beginning to feel it had run its natural course. And since the book was published, I have been contacted by many men asking to meet me - so I don't feel tempted to do any more internet dating.
However, online dating is a world of opportunity, courtesy of our wondrous modern technology. Delve in. And good luck.
Four more tips for online dating
• Try a few different sites, subscribing for the minimum period on each (usually a month) until you find the right one.
• Don't provide intimate details about yourself until you feel comfortable with the person you are dealing with.
• Never give money to anyone for anything. If you are a woman, at most offer to split the cost of drinks or a meal.
• Be friendly but on your guard. Enter a dating site as you would walk through a slightly sketchy part of town: looking over your shoulder and holding on to your valuables.
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