Nope, as it was at least partially available it was supposedly determined to be a consequence of the mass privatization of subreddits.
The theory I heard was that the way Reddit caches its subreddits for the front page didn’t jive well with so many subs going private all at once.
I mean, maybe? 4channers do some pretty crazy shit when they’re raiding, at least from what I’ve seen. Remember when they raided Microsoft Tay’s Twitter and turned it into a white supremacist?