Uh, no. The problem is what to do with public sinners. Back in the 11th Century, a king of France take a noble man's wife away from him. A local bishop excommunicated him and was backed up by the pope. The king finally had to do public penance and agree to give up the woman.
Assuming you are talking about sinners who are not subject to prosecution under the law, I assume that those who are without sin are eligible to judge them.