"I can't help being worried when I see that nudity is preventively banned from artistic expression."

It's not. Nothing is preventing you from posting nude images. The flag simply flags the image only for people who choose the option. Unless you feel that something so small as the occasional person occasionally using the flag is such a form of censorship to you, there is no reason to feel your form of artistic expression is being surpressed in any way. Your use of the word "banned" is way out of context. No one is "banning" anything.

...... Kendra