I attended a "Jail N Bail" event earlier this year benefitting the dependents of law enforcement officers killed in the line of duty. I can only assume the detractors have never been to one or even know what it is because I can't see how someone could HONESTLY be offended by it. I wish that these groups hadn't cancelled the event.
http://www.thecollegefix.com/post/19883/
ETA- I was going to post this in the offensive costume party thread but it looks like it's been deleted. Too much butt hurt going on there I guess...