If there are comments breaking the site guidelines that aren't getting moderated, the likeliest explanation is that we didn't see them. There are far too many for us to see them all.

Referring to authorities as "petty tyrants" or whatever probably doesn't count a personal attack unless the "petty tyrant" is personally present. I don't think those comments are very high quality, but this is the internet. Trying to raise comment quality is like trying to lift a tsunami. We do what we can.

I don't agree that personal attacks are "small". I think they are particularly poisonous to community.