I've been monitoring for a year and no one has shown up on my doorstep. I'm sure you've heard about the moms who actually started their own business monitoring Islamic forums and chat rooms, turning conversations and info over to the FBI? You have nothing to worry about. I would venture into the Arabic forums if I knew the language. That said, keep in mind that there is only one way to understand the enemy and that is to listen to what he says.
Yes I have heard of them...besides, even if they did knock on my door...I have nothing to be afraid of NOT GUILTY of anything..(except having fattening snacks in my house)>