I've [reached out][1] to Community Managers at the [Tavern on the Meta][2] as this can only be done by Stack Exchange employees.

[SE developers can blacklist tags so that they cannot be used][3]—attempting to submit a question with a blacklisted tag will fail.


  [1]: http://chat.meta.stackexchange.com/transcript/message/5276653#5276653
  [2]: http://chat.meta.stackexchange.com/rooms/89/tavern-on-the-meta
  [3]: http://meta.stackexchange.com/questions/95811/how-do-tag-blacklists-work