Not Allowed To Talk To The Media
Since they are secretive in their dealings, the members of the Hells Angels are not allowed to speak with the media. This does not just protect the group, but it also enforces the rules that members do not talk to outsiders about one of their own.
Keeping Things Among Themselves
Members are not allowed to discuss their codes, according to Julian Sher, because it is part of their security measures. By keeping things within the group, the group is able to reduce the risk of information being leaked, which in turn helps protect the group as a whole.