Visting ServerFault this morning there were a large number of old questions (posted 2009) that have been edited and therefore bumped to the front page. While I find this highly irritaing as it is, two of these questions were already closed (oneone | twotwo) so apart from having the questions bumped to the front page and a tag added they have very little use.
I would go so far to ask that tag-only edits don't bump the question.