Karlotta,
although I like your ability to point out double standards and would agree on most of what you find, I think you overinflate the villainy behind the people's actions you criticize so often.
It looks as if you believe there can be a "fair and just" system that would maintain itself, wouldn't descend into cronyism, and wouldn't cost us resources we don't have.
My view of it is that having a possibly biased GM or Mod, who arbitrarily slaps people who he thinks deserve it, is a cheap solution and is still a system that works for a small gaming community like ours. We don't have a judicial system and a million-dollar budget for it.
This being said, I agree that people who take the role of a staff member should refrain from trollish and otherwise indecent behavior, or at least separate it from their staff duties, right and responsibilities. Or have those taken away from them. The examples you have provided are outrageous, yes.