Not talking about totally blocking them, or auto-deleting spammer types, just a localized (temporary) ban from one thread until mod intervention.
See this one:
https://bbs.boingboing.net/t/generic-2016-us-election-cycle-recycling-bin/65103/2288
It got closed 10 days ago because of one person (who eventually got a timeout). But the thread never got re-opened, we ended up with a continuation topic.
