All users must behave in a civilized manner according to the rules of general netiquette when being engaged in a discussion with other users.
It is not allowed to post images or links to other websites containing illegal (German law!), pornographic, very violent or otherwise objectionable content for a board which is visited by minors.
It is not allowed to plug illegal activities.
Avatars and signatures
It is not allowed to use animated pictures for avatars and signatures, since they are too distracting and annoy other users.