A lot of people on Facebook are nutty. It makes sense; there's a fair amount of nutty people in day-to-day life. But there's something about social networking that leads some people to be a bit more free with their thoughts than they might be in real life interaction.

Well, thanks to a group of researchers in Sweden, you can now tell which of your Facebook friends is normal, a little odd, and flat out psychotic!

According to this article, "participants who showed psychopathic traits touched on such topics as prostitutes, decapitation, pornography and butchers in their Facebook updates."

See? Now you can steer clear of those Facebook friends of yours who love talking about brutal violence and porno. Now if you'll excuse me, I have some Facebook statuses to edit.