Meh. Not like I really care about what happens to them, but this is over the top.
If you really want to make Danbooru porn-free then make Danbooru porn-free, don't just use that as an excuse to purge a single tag that makes up not even 1% of the explicit posts and under 0.2% of Danbooru as a whole.
It's true that there are a lot of crappy nude shops, but there are well done ones too. The same goes for pretty much any other porn-related tag. I just don't see the need for a crusade against all the nude shops here. We allow hard translations so it's not like Danbooru's policies prohibit derivative works in general, especially if the original is already posted.
A large number of the posts in question were posted by regular members. That means a mod/janitor explicitly approved them. Maybe all it takes is to make the janitors (and mods) aware that they should exercise stricter quality control on nude filter posts.
Outlawing the tag as whole, putting it on the same level as furry, yaoi and guro, is really not warranted.