Well, we have a tag called error. Its description says:
Please use a more specific tag instead.
Awesome. So what do all these 547 questions have in common? A non-descriptive tag. On Oct. 10, @random even mentioned in the excerpt history:
Let's stall this one if not outright kill it
I vote for killing it (with fire, of course). Nobody will ever use this tag – a lot of questions are only about error messages, and I can't imagine anybody using this tag as a favorite.
What do you think?