"It's worth noting that this is just the latest in a long series of episodes of harassment which Randi has experienced -- it's not just another case of gamers taking their competition offline, which is the most common swatting backstory I hear about these days."
(Emphasis mine.)
Asshole gamers calling in real-life SWAT because they can't handle feelings of inferiority is the most common reason for SWATting that I hear of.
I hold the opinion that giving police fraudulent information in order to summon SWAT on someone's house is HIGHLY inappropriate and -often- very dangerous[0]. While cperciva doesn't explicitly express his opinions on SWATting, the remaining 'graphs in his comment would lead one to believe that he also thinks that SWATting is serious business, regardless of motive.
[0] Not to mention, yanno, illegal.