When I first joined k5, I became a trusted user after a couple of days. Then I lost it. Deserved it, too. Shouldn't have made the bitchy comments.
Then I found I'd be trusted for a few days, lose it for a week and so on. Not because of wisecracks, just because I'd find a lot of people disagreeing strongly with what I'd said or how I'd said it.
After a few weeks I just stopped bothering. So it would be "Oh, look, I'm trusted! Which comments did that?" but not "Great, I'm trusted!" or "Damn, I've lost it!". The discussions regained primacy.
It's good that people can lose their status quickly. Teaches them not to get hung up on it.
The best thing about the mojo rules is that they are transparent and simple. This is very important. A couple of months after I joined Slashdot I had a karma of 13. But I'd never found myself reviewing comments, didn't know if 13 was good or bad, didn't know how close I was to the magic number. Maybe I was never close - the rules are not explained and are weighted according to some secret "approved" model of behaviour over and above the ratings given by your peers.
I disagree with your proposal because the rules should be a simple as possible. And for the reasons given above. But mostly for the simple reason.
