If a consent decree provided that a violator could be punished by having his ears cut off, the judge could not sign it; nor could he if the decree placed on him duties either inappropriate to the judicial role or excessively time-consuming in relation to his other responsibilities. Donavan v. Robbins, 752 F.2d 1170, 1176 (7th Cir. 1985) (Posner, J.).