I know wayyyy too many perverts but I won't get into that. I'll laugh at when someone says something with innuendo and someone yells out "That's what she said!" but actual perverts disgust me. Still, I won't get into that part.
I've been called a "stalker" before, but it was in good fun. I guess I somewhat am by definition, for example... if someone online is trying to speak with me, and I've talked to them for a bit, and I want to know more about them I'll do some research. Google their MSN, find their name, google their name, read facebook profile, the likes. I personally don't really think that makes me a stalker exactly, because I never got the information for the purpose of finding their address and tracking them down, just to find out things about them.
It did help me once, as it turns out this guy who was talking to me was actually a bigger creep than I thought, he flirted with a bunch of 14 year old girls on a forum (in a rather... personal and creepy way), and he's in his mid 20's, so like I said- not for a bad purpose.
I used to have someone who stalked me though, he would call me all the time and try to get in contact with me when I told him I didn't want to. Not so much creepy as it was annoying. At least it wasn't anything too serious, like showing up at my house... THAT would have been ridiculously creepy, as well as scary.