Michael Zhang of PetaPixel got back to me after I told him I was going to stop submitting content for consideration, and we had a nice conversation.
In short, PetaPixel is a tiny tiny operation and simply does not have the resources to moderate the comment threads (which is what I had assumed), but Michael and his tiny staff are interested in hearing about inappropriate comments. The correct action is to use the Report feature of the disqus comment system (which is what PP uses) and then the staff will see these comments and -- at their discretion -- do something about it.
They seem pretty ruthless about outright banning people. I assume their attitude is that they have a million readers (literally) and they can afford to pretty much execute readers without warning pretty much full time pretty much all day without making a dent.
So, Report Vile Comments.
I will be sending content PetaPixel's way on my usual very very occasional schedule. Also, I will be reporting inappropriate comments with some vigor. Off and on.
And that's enough about that. I am ruminating on the role of interpretation in Art-making, propaganda, photography, and will deliver some tedious overlong philosophical ramble in due course. Promise!