Out of those, only the Aftab case predates moot selling 4chan.
That one was done by partyvan crowd who had been driven off from 4chan by that time.
It would’ve been 888chan, 711chan or rockstararmy. Of course, journalists don’t care about such distinctions and will group all of them together as “4chan”.
https://www.dailykos.com/stories/2018/06/06/1769711/-David-H...
https://www.gawker.com/5824545/internet-prankster-sends-swat...
https://books.google.com/books?id=sRsxDQAAQBAJ&pg=PT16&lpg=P...
https://www.sunherald.com/news/local/crime/article257253377....
https://psc.apcointl.org/2011/08/01/swatting-9-1-1-hoax-call...