I did a stack of internet dating a year ago. Met about a dozen guys. Most were nice and normal but things didn't work out.
From spending a lot of time doing it, it seems that people on the dating sites fall into 3 categories..
1. Wanting sex only,
2. Geeks and losers who can't find that special someone,
3. Normal people.
That might be a bit harsh to say that, but the 'normal' people are hard to find.
Here is my worst experience....
I met one guy that I saw for a couple of months. I knew he was a sleazy cheating sort but I found out more about him than he wanted me to know. When we met he said he was 30 with an 8yr daughter. In reality he was 42 with a 19 yr son and the 8 yr daughter. He also had multilple ads, one as a 28 yr old who was chatting up 18yr old girls and also chatting up young men for sex. He also had an ad as a 23 yr old lesbian who was chatting up other women. He was arranging times and places to meet men for sex, but not turning up, just like it was all a big game. He was straight but just leading people on. And to top it off he was into orgies and swinging in a *major* way and had also taken unconsented sex videos of me and him and was showing them to his son.
Needless to say when I found all this out I told him to **** off and I haven't seen him since.