I think we have enough guidance from the top, and it's common sense, like no tags or flags for opinions or trolling. The problem is that any word from theymos gets interpreted and misinterpreted in ways that completely skew the intent. If he says "this behavior may be a reason for negative trust but..." you can bet that some people will ignore the "but" part (and treat "may" as "must") and some will focus entirely on the "but" ignoring the first part.

Just use common sense and good hygiene in your trust lists. I've found that it's far more valuable to build my trust list not based on whom I agree with but based on honesty and ability to reason with. Your mileage may vary.