The Six Rules for Spectator-Officials

1. Do not wear your uniform or identify yourself as an official to those around you.
2. Be aware of your surroundings.
3. Be respectful of your fellow officials.
4. Appreciate the fact that public displays of disagreement, ridicule or denigration of fellow officials undermine their authority.
5. Showing support for the players is not allowed; however, that should not translate into not supporting fellow officials.
6. If a rule is obviously misapplied, keep your mouth shut.  Nothing positive can come from talking about it in the stands.
Source: Leave Your Stripes at Home by Gary McGriff, Referee Magazine, December 1999.