Sorry you're feeling bad about this chap, rickman. It sounds lilke a case of right bloke wrong time, maybe?
FWIW, I don't think online dating is all bad - although I would avoid 'chatrooms' like the plague. You can't avoid the weirdos completely (as in real life, after all) but you can sift quite thoroughly on a 'reputable' site, ime!
My brother met his lovely girlfriend through Guardian Soulmates and I've used datingdirect - as have several of my completely normal and delightful friends, male and female. None of us have ever had bad experiences, although some disappointment is inevitable!
I'm a bit like Xenia - I have strict criteria, don't give my mobile number out etc. Of course it doesn't mean I'll never get caught out but if a man is genuine he will understand all of this. Tbh I don't really see how it's that different from meeting men in any other environment - you just have to be a bit careful.