I’m very much not a fan of this approach. Preservation of conversation history on the web is valuable to real humans who may have bookmarked pages or be searching for obscure info.

And I’d have to imagine the whole corpus from past years has probably already been fed through AI. Besides that, editing/deleting comments probably only hides them from other users, Reddit may very well keep them saved (or at least have backups).

Best thing anyone can do, IMO, is avoid giving them new traffic and content. Attention is the currency they deal in, and most of it comes from people browsing new content.