I have yet to come across an mmorpg game that doesn't have to put up with its share of botters in some form or other. From WoW to MapleStory if someone thinks they can make a buck selling in-game currency to active players of a game then they're going to try pushing the boundaries of the terms of service of said game just to see what they can get away with.
In all honesty, I don't think there is a true solution to the problem without some impact on a company's business model--subscription or f2p. Whether they choose perma-ban, temp-ban, or ip-block there are nefarious (not to mention freely-available) methods around it if one chooses to and the PR windfall can be brutal for said company as well.
In life it would simply be much easier if folks just maintained honest relationships with companies they wanted to do business with and simply abided by common-sense rules to . Maybe online environments would be a much friendlier place and there would be no need for endless pages on terms of service with addendums and caveat emptors.
Apologies on the long-windedness and I realize it's a figmented world that I posted about but it would be nice anyway.