Yes indeed. I know a girl that was arrested 2 weeks ago, and the officer had let her grope him. It wasn't enough to allay her suspicions so she insisted he whip it out before they discussed services, which he refused to do. She KNEW he was 5-0 then, and tried to throw him out, and was when they kicked in the door of the hotel room...
Even if you follow all the safety rules, in the end they may still lie and say you did in fact agree to exchange sex for money even if you did not. They don't like it when they get "made", and may bust you even if they know it won't stick, just for spite.