"ppl don't kick a dead dawg"

abc   Sat Apr 22, 2006 11:13 pm GMT
I've already used this quote and don't wanna use it again (on wutever I'm doing). Can you think of any others with the same or close meaning?
Jim C, Jorvik   Sun Apr 23, 2006 1:19 am GMT
Flogging a dead Horse, trying to squeeze water out of a rock,

Can't think of any others at the moment, I'll get back to you