Is this a bug??
Why should it be a bug, admins can do anything.
Both Theymos and Cyrus can do that and this quotation confirms my words.
Theymos has stated he'll remove them for people who don't want theirs anymore, but he won't change it. Best PM him but he's usually pretty busy.
Just like
Cøbra got a "Custom Title."
The best guess is that Cyrus wants to thanks "alanst" for his efforts in translation [1], I do not know about "3dOOm" I searched on the Internet and did not find much information.
A Big Thanks to Recent Translators