To answer your first question about user names.
When you sign up and are suppose to read ToS. It states this
"4.5 During the registration process for the game, the Participant chooses a user name under which he will be registered as a Participant of the game. It is strictly prohibited to chose a name with content which is pornographic, racist, inciteful, glorifies war and/or violence, offensive or otherwise illegal. Breach of this clause entitles Bytro Labs to immediately exclude the Participant from the game."
Answering your second question is we do have chat rules listed here
Chat Rules - Rules - Supremacy - ForumThe chat does have a filter system in place but one can not filter all words. A lot of the chat rules are enforced in games as there is no real differences.
Concerning your last statement is that its best to not deputy mod as you will also be adding to the existing problem. The best way of doing so is to report such content and to avoid further complications.