Chances are if you do get banned you can just ask customer support to unban you

AFAIK they went a step above that and whitelisted the particular heuristics that WINE was tripping up in their anti-cheat so that Linux users would stop getting banned after a while. Not sure how effective that was, I personally never got banned though. Short of actually supporting Linux, that’s probably the nicest thing Blizzard has done recently lol.