How do you trust someone?

[PM_Mama00]

I met this guy on plentyoffish.com. He was awesome and we really clicked. He kept insisting that I come over and meet him alone instead of in public. So after a few days going back and forth, he got weirder. He told me we wouldn't meet because I wouldn't do it his way. A friend and I were driving around and happened to be by his house and he got mad that I tried to stop by with her (which I didn't) and told me to never do that again. I decided to do a little stalking and got his zip code and looked him up on the sex offender list. Yep. There he was. For statutory rape... but still it explains his behavior.

Does anyone else do this kind of stuff when meeting someone new?