As possibly the only person in this discussion who's been to Bagby, I'd hasten to point out that arguably, including nudity in the article would be the most accurate way to depict it. I've seen more naked people there than clothed people.
But yes, I agree with Sarah -- having images of naked people on Commons is a very different thing than having naked people used to illustrate an encyclopedia article. And this particular example is one of many, many thousands of images of nudity on Commons, some of which are far more problematic. I would urge anyone wanting to take this issue on to spend some time processing maybe 20 or 30 of the dozens of deletion requests that come through Commons on a daily basis. It's a good way to get a sense of the scope of the issues involved, and the thinking around what does and doesn't get kept.
http://commons.wikimedia.org/wiki/Commons:Deletion_requests
-Pete
[[User:Peteforsyth]]