What the film makers are thinking and the deeper message

I just saw this on DVD and thought it was a good film. But the opening warning about stalking and the general feel of the subject matter makes me feel like the film makers are saying "watch out, this could happen to you" in the age of the internet and micro video etc. But on one level this seems hyper paranoid and films like this make the idea of a normal relationship seem, well, old fashioned (and a little creepy?). If you are a regular/lonely or slightly shy guy looking for a girlfriend you had better get hip because films like this (and Hard Candy) are going to make single women really paranoid. I just don't know if the sense of "this happens all the time" and "watch out for creepy single guys" is in any way justified if it is proposed that this is a serious or constant threat to women; I don't think that threat is real.

Yes, a lot of guys are creepy and weird about sex and don't know how to be natural around single women, and a lot of guys might be closet voyeurs if given the chance, but to think there are "a lot' of guys out there like the one in this film is ridiculous and paranoid. A guy like Hanks character is about as common as a serial killer which is not a common occurance, it is extremely rare. So if the film makers are saying "here is a really scary, weird, very uncommon story about an extremely rare murder" then that's cool, but that puts this film in the category of Silence of the Lambs or Henry, Potrait of a Serial Killer. I guess I really wonder though about the general tone of this film and where the film makers were coming from because it seems kind of far fetched to me, but i'm not sure it does to them.