if you know someone believes strongly in something which you can't disprove (religion according to yall has no proof, so how can you DISprove it?) why would you try and convince them it's wrong?
Mormons and Jehovah's Witnesses, I see them all the time. If my neighborhood wasn't so far out of the way they would no doubt be coming down my street as well. Even when I was visiting my grandparents in New Jeresy they'd come by at least once a week.
My opinion on the matter is everyone should be free to believe what they want to believe, just don't preach to me, I have a Mormon friend that will sometimes just look at me and say "You will see one day, the day where the lion will lay with the lamb." (or something along those lines) and it pisses me off so much when he says it.
I had some Jehovah's witnesses come to my door the other day, and the first thing they said was "Hi, we're from so-and-so church and we're here to talk to you about who really rules the world!"
It struck me as unbelievably shortsighted. They were pretty much 15-16 year olds, too.