Wh-what? Yes fines! ABSOLUTELY yes fines! The punishment should be blunt, uniform, and intimidating! This is absolutely a situation for fines!
To cover refund is a much bigger "fine" and the money flows directly back to those who suffered, that's not the case with fines, and fines are mostly small change for big-corps.
Just extend the rights of Customers and everything could be fine.
But fine (pun intended), let's do both. Seriously, this sort of stuff should be discouraged in the strongest possible way.
Absolutely fine with that, plus a massive fine if the refund is not paid back in a fair amount of time ;)