In my company we still use Skype for internal purposes. One client can have many projects and each of them can have one or more chats (sometimes my list can easily contain dozens of them).
Even if you turn off notifications, those chats are always going up and down, blinking, making it harder to look for current projects info (another dozens of chats). Usually when you are being assigned to another client, a manager of former project excludes you from chats of their responsibility.
The last time I switched projects one of the managers didn't exclude me from his group chats and recently one of those became so annoying I left it and others by myself. A few moments later a manager of one of the most annoying project's chat said that I was rude and said to just turn off the sound and never leave the conversations.
I left that project 2 months ago and will never ever come back to it. The manager was one of the many and not a senior one. We have no internal regulations on this regard and I never had such problems before.
But now it bothers me if he really was right. Are there any rules of etiquette that apply in my situation?