@Wbud no, they won’t. Why do people still spread that?
The only people they banned were people who worked around their anti-cheat, which was a big well obviously and happened quite a long time ago.
They just don’t let Linux users in by default it’s blocked, no bans.
@gamingonlinux Being banned is in their official documentation:
"Players who are not accessing Destiny 2 through Windows and attempt to bypass the SteamOS/Proton incompatibility will be met with a game ban."
https://help.bungie.net/hc/en-us/articles/360049024592-Destiny-2-Steam-Guide