If I had my way, NO flag would be allowed on the site because I don't believe real world political references have any relevance in an MMO forum. However, I was overruled. A flag in and of itself is not against our rules, but slogans, images, poems, blurbs, etc. generally are.
I have my images blocked because I tend to view these forums from work, so I recommend you use Mozilla Firefox and have it block all external image linkings. Unfortunately, this does not get rid of avatars. <_<
Any questions about the way things are done here, please have a chat with Devile/Festo. They make the rules, we only enforce them.