I can’t do a strict comment policy with specific rules, because my brain won’t work like that. Everything depends on context. But here are some basic guidelines:
Positive comments are almost always okay.
Negative comments and disagreement are also almost always okay.
Malice is never okay, even when it tries to be sneaky and hide behind ideas like ‘disagreement’. I have no tolerance for malice and bullying. This includes malicious gossip.
Anger is okay. Attacking people in certain ways, is not okay.
There are some other things that are not okay, even when people mean well. I’ll have to deal with them as they come. This is pretty rare, though.
Obviously these things are subjective and I will make mistakes. But better have things be subjective and dependent on context, than rely on a rigid and elaborate set of rules. Rigid and elaborate sets of rules always manage to make it so that people who can ‘play the game’ do well even if they’re being horribly malicious and nasty, and people who can’t ‘play the game’ lose out even if they’re not really doing anything wrong. So I refuse to do that to people. I can’t claim that I will always catch the bad things, or that I will never accidentally censor someone for doing something that isn’t wrong. All I can do is try my best.