Today I got this email from ArtOfCode, a Hardware Recommendations moderator, after he changed my username on HR from "Mͣͭͣ̾ Vͣͥͭ͛ͤͮͥͨͥͧ̾" to "user924":

Hello,

I'm writing in reference to your Hardware Recommendations Stack Exchange account:

http://hardwarerecs.stackexchange.com/users/924/user924

I've just removed your username and set it back to its default value, "user924". I've done this because your previous username made extensive use of "Zalgo" text, which is disallowed in usernames.

Please feel free to change your username back to something of your liking, bearing in mind this prohibition.

Regards, ArtOfCode Hardware Recommendations Stack Exchange moderator

And then he went on changing my usernames on every single community I have an account on! (Changed from "Matas Vaitkevicius" to "user924")

Why are moderators allowed to change usernames across all communities?

Btw, I would appreciate if someone would revert my username to the way it was before on non-HR communities (I am fine with user924 on HR).