There have been some recent discussions about Star Trek, Harry Potter and My Little Pony tags. While Star Trek tags seem to usually be prefixed with star-trek-
(see the tags page) this seems to be inconsistent. For instance, the recently discussed happy-place has really no meaning for people that are not familiar with Rowling literature. In order to bring consistency to the tag system (which appears to me increasingly chaotic), I suggest to have some rules for names of sub-tags of a given Universe.
For instance, the tag happy-place should be harry-potter-happy-place or hp-happy-place. It would make sense to apply this to all such universe-specific tags, wouldn't it? What do you think?