Apparently, you can run afoul of the law by using sarcasm or slang. These behaviors, and many more can generate an Anti-Social Behavior Order (ASBO), which are designed to counter "loutish and unruly conduct."

Oh yeah, THAT seems like a really cool idea! Oh, wait, that's sarcasm.

What genius thought that up? Darnit, there I go again.

I'd better stop now before I get written up...