I look at a community forum the same way I do someone's home.

For example let's say that I am a smoker and I go to someone's house and they are nonsmokers and don't want people smoking in their house. Do I disregard their rules and light up regardless of what they want in their own home, or do I respect their right and go outside to have a cigarette? 

I could easily argue that by refusing to allow me to smoke in their home that they are trodding on my rights to smoke, just like they could argue that it's their house and they have a right to put in a no smoking rule.

However, they haven't barred me from smoking on their property, just from smoking inside their home.

I use that smoking example because I am a nonsmoker and I actually had someone do that to me. She knew my home was nonsmoking and she did ask if she could smoke and I told her no and said that she could go downstairs to have one. She said that she didn't want to go downstairs and she opened my livingroom window and lit up a cigarette and said "I'll stand here and the smoke will go outside."  Needless to say she was never invited over again.

Renderosity hasn't barred you from posting nudity and violence....they just ask that you limit it to the actual image and not the thumbnail image.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi