Any person who ever does anything to manipulate the economy or glitch/hack gralats should get a permanent ban and there should never be exceptions to it. That's just my opinion. Why? Because I've probably spent $100ish of my own hard-earned money to get just a fraction of what these douchebags managed to cheat.
I regularly hacked forms of currency on PC Graal (but was very rarely stupid enough to get caught) and if I was ever banned then I'd completely, and obviously, understand why. The difference is that people on PC Graal weren't spending real money to obtain what I was cheating. Wrong nonetheless, etc.
By not making a statement and banning those people for long, long periods or time (permanently would be best), it's basically a huge disrespect to people who pay real money and support the game. Just throwing some names out there: people like Nadine, Junior, etc. Even some people who frequent these forums. It's pretty bad.