[pygorex]

Even a cursory scan of the http://urlfind.org/?server-status list reveals scads of porn sites exposing their visitor's IP addresses:

(Note these links go to Apache server-status pages at the time of linking. This may change if the server admins wise up - to be on the safe side consider them NSFW):

  http://black-tgirls.com/server-status
  http://badexgfs.com/server-status
  http://tubepornx.com/server-status
  http://lesbianvalley.net/server-status
  ..... and many more .....

Personally, I don't care what consenting adults do with their genitals. But I think it's safe to assume that the visitors to these sites expect a certain level of privacy that's not being met.