Players who get banned for hacking.

[Notorious]

Regarding players who got banned for hacking: that's one way to do it for those that have hacked in the past.
For the future though: I would like to take it one step further and say that the FGunZ accounts of hackers who've been proven guilty should not be unbanned at all, so they permanently lose access to that account with everything that's on it. Once they're allowed back (after x months) they will have to make a new FGunZ account, so some of them might think twice before repeating that mistake.

Wouldn't chargebacks become a major issue?

Also tournament item held accounts should be follow a similar rule as VIP accounts, if anyone but the tournament winner is found to be playing on X account then items will be removed.