I remember linux-users being banned for "hacking", but it was because they were using a virtual machine so they could play Diablo on a simulated SO as windows, so, surely they'll be some (if not, too many) wrongly banned accounts.
Brace yourselves, complaints of non-bot accounts are coming.
Note: i remember some MMORPGs that used (although isn't a fast method, but more precise) some kind of "moderators" or users who, for a short time, were playing with the others and looking for bots personally, and they had some kind of option/command/message to ban or report those bots. I doubt this can be or are willing to use in here, since this is not a MMORPG (but also, Diablo III is not an RPG, is an ORPG, or MORPG?, whatever, to play it on solo you have to be online all time?, epic fail). I guess statistical data it's a way to identify bots (not 100% accurate, and probably will find a lot of false-positive), althougt doing something like recording a player or checking some behavior or data.