1) "Ignorance of the law is no excuse" only applies to regular people, not them.

2) Who's going to arrest cops? Other cops? Yeah, that's going to happen. Who's going to prosecute cops? The DA's that work with the cops on a daily basis? Good luck with that.

3) Cops are out there protecting us from them. Of course, when you look closely it starts to look a lot like "us" is cops and "them" is... us.