Pretty solid, but a question if you please.
>3b) the filter-using anons oblige, and filter the UIDs.
You are suggesting that those who filter an ID, will also filter responses to that ID which they cannot see because it's filtered?
This is something that I personally have not done and have not observed. I am wondering if some anons really do start blasting away at everyone who replies to a known shill. Not sure that makes sense, because our cadre of anons know that every once in a while, one of us responds to a shill just to make it clear to newbs that we recognize the shill tactics. So if we were to filter everyone who replies to a known shill, we would likely be filtering out some of our frens.
Thanks for your analysis.