You can't be punished for parody or speech itself, but you can be punished if you break any laws by publishing that speech. I don't see any laws broken by the Y

You can't be punished for parody or speech itself, but you can be punished if you break any laws by publishing that speech. I don't see any laws broken by the Yes men example. It is reasonable for the police to believe that the law was broken in this case, due to the 911 calls and similar disruption that could reasonably be expected to happen in this case, and the judges agreed, which is why his legal bid to sue the police failed.