It doesn't seem to me like the bare_shoulders tag is meant to include nude characters which obviously have bare everything, but currently about 10% of all bare_shoulders posts are nude solo images.

So should we clean that up and have the wiki clarify that bare_shoulders excludes nude images, or should we go ahead and do something like implicate nude -> bare_shoulders?

No point in tagging it for nudes. Same goes for bare_back. Most (all?) of those seem to have been added to nudes by the same user.

Yep, pointless,
yet I'll wager a few of those (mis)tags are a result of copy and pasting from parent images that involved clothing.

Wish I had been aware of this thread before starting my own on the subject... :P

Anyway, there's at least a couple hundred with bare_shoulders nude on them, and hadn't even thought about bare back existing. Fortunately, as one can tell from my edit count I have plenty of time to spare. ;)

Ok, I cleaned up a lot of stuff, including bare back where I came across it with bare shoulders, but some stuff I wasn't entirely sure on so I left those tags alone.