Say in some kinda f**ked up time in the future, folk like those rioters/chav's that are just a waste of fresh air.. were herded up and put into a big pen, and then the paying public had the chance to go through as if on a Hunting holiday and just pop them off.....
How much would you pay to have a go? In some way's it could be part of the Keep Britain tidy campaign

Personally I'd pay a grand for such a thing.