I don't particularly have an issue with people playing music in Limsa etc but I do take an issue with people that used bard music bots to avoid AFK kicks during Endwalker launch. I know of people that did this because they worked during the day and would otherwise have to queue all evening to play for five minutes before going to bed. It's only an issue during expansion/patch releases but still something that would probably be actioned.

I am, however, require surprised at the lack of anti-cheat in general. You'd think a game with competitive game modes (savage, ranked PvP etc) plus an optional item store (you could just mod the appearance in client side) doesn't have an anti-cheat to protect the competitive game environment and cash store purchases.