don't say that
Already waiting for more than 24 hrs for refund.

Question :

If a renter rents my Rig(s) and doesn't properly configure his pool info uses an unstable or bad pool, or select a coin that is too fast for a high-speed miner and wastes hours of the miner, claiming my miner/rig is at fault, even though it works fine and has even been tested by pointing it at another pool without issues, but then gets a full refund and I'm stuck with a loss over many hours from this?

HOW IS THIS FAIR?  

Perhaps this is why pool owners are being very very quiet about this exploit.

That won't work.

Everything will be bought and tracked in the blockchain, with powerful algos looking for red flags.  Anyone buying or selling 500 boxes of tide will be investigated.

There is no way around or out of the blockchain once cash is banned and everyone is inside the bloc.