For this one you're gonna have to use some good makeup and stuff, but what you would do is make someone look like someone on the FBI's most wanted list and have them hanging outside the white house or outside a police station or something asking cops or agents for directions or something like that. Imagine what they would do if they thought you were that guy.
Or, what about prank calling the FBI? Tell them you know where Usamah Bin Laden is, but you want the 25 million dollar reward first or something. Can you get arrested for that ha.
Usamah, Obama. Sound a lot alike...Coincidence? I think not ha.