Nobody's perfect and that includes the moderators. Some moderators have some biases and will let some post slide by while clamping down on others. That's the way human nature is and you can't do too much about it. For example there are a couple obvious political post in this thread: http://www.redszone.com/forums/showthread.php?t=79217
that you can see that a few moderators have read but for some reason they didn't feel the need to put the clamp down on. I can assure you, these same moderators, would be clamping down on a similar posting from the other side of the political spectrum. But as long as most of the board and Boss and GIK are happy with them, that's the way it has to be.
If it was my decision I would rotate moderators; change them out every quarter. Moderating in a burden, and I'm not sure why anyone would want to hang on to it for a long period of time and take the abuse from us. I guess you have to look in a mirror and honestly ask yourself as a moderator if you are truly being 'fair and balance'.