Cool, yeah I dont mean to blatantly break all the rules but there are limits... Its just the glaring example I had in my head of: I had a disagreement with someone which made me think that they were being incredibly scummy, and I was wrong.
On further reflection though, I dont like even the cop/not cop case. Axxle is hesitant to state reasons why these are bad and I had a tendency to agree with him, however I dont know why. If it is a bad idea to claim it should be the people who know why a scheme is bad for claiming, unless it gives away other information, should let people know.
Lets say only cop claims cop, everyone else claims not cop. Each individual is hunting for scum amongst the 5 players not themselves. All we've done is outed the cop, which is terrible when there is a 4/6 chance to fail to hit scum for our lynch. The way that we improve that is if doctor claims too. That puts the chance at hitting scum at 2/5. We have traded both our power roles for a 40% chance to hit scum. So if it is random, more likely than not both scum is alive, they can keep doc off, kill the cop. Easy for them. We have now mislynched and our down a cop, potentially with a revealed doc. The next day we are at 2 scum, 3 town and no cop. This seems bad to me.