All they need is one downvote to get them right to the bottom where they can live rent-free in peace and cease to trouble+harm to the rest of us and derail the discussion into flame war teritory.
Most of the time they delete and I helpfuly annotate my comment they were parasiting off with
Edit: Another one bites the dust.
We can even substitute their handle for the Another and use that to build a case to ban them by crawling over or aggregating the Edit: ___ bites the dust as a query or format or whatevr