@agates @errhead @errhead @alex This case is not covered by existing standards. I'm not familiar with how PeerTube implements replies/comments collection, but I would simply remove the offending object from the collection.
Perhaps you'll be able to find some useful info here: https://socialhub.activitypub.rocks/t/fep-5624-per-object-reply-control-policies/2723
Also, what's the current state of AP support in your application (Podverse?). Is it ready for production use? If so, I could include it in my @weekinfediverse weekly newsletter.