Any StackExchange can have any tag - users add and curate them. Mods can "burninate" them[0], or blacklist them if they are total trash.<p>[0]: <a href="https://meta.stackexchange.com/questions/120640/what-does-it-mean-to-burninate-a-tag" rel="nofollow">https://meta.stackexchange.com/questions/120640/what-does-it...</a>