Undoubtedly at some point vanity items will cross a line for some players. For me this is the saxophone. Every time someone in a dungeon group spams it it makes me want to log off. I have to take time to mute my client and turn music on.
Please add in game options to exclude some of the vanity clutter like extra noises or people's Sparkling/Glowing items. Vanity items may cause some people's clients to lag and they'll want to turn them off. This game works a lot like PoE and that is a real and actual problem in PoE at the moment.
For me personally the saxophone being able to be muted is a great starting point. Even just moving it to a different sound channel like "Background Music" or "Ambience" so I can mute one of those instead of my sounds effects overall would be a great workaround in the mean time.