Come on guys grow up seriously. The reason that they card at airports it to make darn sure that no know terrorist is in a position to hijack an airplane. You know, because they've done that before once, and it kinda sucked for the people on the airplane, and the building they rammed it into at full speed. This is the same thing, they want the IP (which they can get a name and location from) for a guy that they notice is hanging around online groups that preach or support jihad and possibly looking up bomb making sites. The reasoning is pretty simple, a guy reading about jihad and bomb making is probably going to eventually plant a bomb someplace. The idea that the government might want to take reasonable steps to prevent its citizens from dying is a good thing. And at any rate if they didn't get IPs and there was an attack, you'd probably be first in line to say "why didn't you get the IPs of all those people on Al-Qaida.com?"