It means everything about modern society that the person saying it disapproves of. In this particular instance it means criminals suing the police for injuries sustained by them in the course of being prevented from breaking the law. I use it ironically in this sense, since I know all the fuel protesters would be 110% on my side in saying other lawbreakers shouldn't have those rights, and probably read the Daily Mail which is especially vociferous in defending the fine old English legal principle of turpi causa.