I cannot go into detail on specific cases, but this is a general explanation of why we blacklist content.
If it's porn or could lead to porn being posted.. we ban it.
Otherwise... we receive lots of requests to remove pictures every week. These vary massively in tone and strength from polite emails to solicitors letters, to full blown 'we will take down the site in 24 hours' notices.
Even though we always remove content when asked, people go about it in different ways. (if anyone is reading this before wanting a removal, I'm sure its easier and cheaper to just drop us a polite email rather than send a 48 page solicitors letter, special delivery from Paris
How we deal with a ban usually relates to the 'severity' of the request.
If we get an email from a FM or their agent asking that pictures of him in such-a-situation or from such-a-shoot should be taken down then we'll just ban those quite specifically. If we get a notice, and our server hosts get a notice, that if any pics of xxx taken by photographer xxx are EVER shown again on our site, we'll get a multi million dollar lawsuit and the site will be pulled immediately.. then we'll ban that FM entirely as it's not worth risking the entire site for the sake of one famous male.
If that male, or their agent, then contacts us to ask why we've banned him... we can pass on the correspondence we've had.. so hopefully photographer xxx won't get any more business.
As you say, it is strange that in the majority of cases, famous males pose for photoshoots for publicity. The people who own the rights to the pictures then do anything possible to stop them being spread.. thus killing publicity.
In some cases this can be justified by pics being leaked before their magazine release date (for example). This is understandable and often results in polite 'hold back' requests.
There are a lot of people in the media and images industry (unfortunately, many in the 'gay' industry) who seem to have quite severe 'anger management' issues. Some of the emails we receive are shocking in their offensive, abusive content.
Every 'blacklist' is made for a reason, and 99% of the time that reason is to protect the site from closure or fine (that would lead to closure).
At the end of the day it's a case of looking for those pictures elsewhere.. usually on similar sites that don't seem to get as much legal grief as we do.. but that's the price we pay for being so popular and well known I'm afraid.