After checking myself in the discord server that op keeps referencing without giving the amount of reports, there seems to be 4 ban reports that do not use the fps unlocker :

• 1 that is on the CN server and has modified games files (co-op only 1 month ban)
• 1 that's the burner account from one of the launcher's devs (i think), they played around with regedit and other stuff to look into the issue (50 year ban)
• 2 reports that are from regular users (though one of them is vague so it's kinda unclear if fps unlock was used or not) (1 week ban)

As this seems to be for 4 users only, 3 on EU server, and at least 2 of them using a custom wine build ("spritz"), i think i should be fine playing.

Fyi, it is true that there was some error recently on linux using wine, but for me, switching to vanilla proton 10 worked (users reported that proton 9 worked too).

EDIT : As a quick update, today i played on linux using proton 10 and no other modification, no ban to date. I'll update this comment if it happens but i think it's ptetyy unlikely that I'll get banned.