The closest I've ever been to a riot is watching a news report about a riot. I don't go out to pubs and clubs at night, so I avoid the unruly people who tend to start these things. True, I'm not completely immune from being involved in a riot just because I don't go to pubs, but it drastically lowers my chances of ending up in the middle of one.

They look pretty scary, what with all the flaming bottles and the like. *shudder*