>You would not pass your rules, I think :) Is wearing the head scarf (or how is it called?) allowed?
The clause you are referring to is known as the "helmet" clause. We added that last year on the nightlife site when a user started to upload an image of him on his bike where a full helmet covering his entire face, including a dark teinted shield, was in effect. So, of course, there was no way of identifying the person. The helmet clause and wearing something on your head are two different things.