Ummm... have you talked to Stacy to see what is bothering her and what would cause this sort of behavior? Try avoiding the punishment for a little while and just talking. There may be some underlying cause for why she is acting out. That needs to be resolved because that sort of behavior in my opinion is unacceptable. But, if there is an emotional situation driving it, punishments won't correct the problem. The emotions need to be faced and taken care of first.