i was in the same situation once... the pool was so bad, that it keept switching to my backup pool.
and it would not go back..

well, if somebody rents hashig power and then uses a bad pool, that is their problem, not mine.
when I mine for myself, I have to watch my pools as well. that is the risk.

people are not renting "i get this amout of coins in 3h" but "hashingpower", if they rent it and let it go to waste, that is their problem. renters have to understand that and not complain!

I think the lender should have a chance to rate renters and dissalow them from renting again, if they keep complaining about their own faults ;-)

kind like "user xy cannot rent this rig".