You'll get stuff like this:
[video=youtube;8FCrdM5ADgE]http://www.youtube.com/watch?v=8FCrdM5ADgE[/video]
Don't get me wrong, I found this video very amusing.
But if somone pulled something like this on me, I will kill him/her.
(ok, ok, maybe not this exact joke, because its kind of obvious, but I have seen hidden camera shows, where they arrest people after a holiday to mexico after hiding 2kg fake coke in their bags, and keep then in custody until they break down on camera.)