More likely the banned gold sellers/buyers. They are also the type of people who would do such.
If it was Blizzard it would be 24/7. (Thanks m8 good point!)
And there's a theory that the poll whether to unban the RMT banned players is actually instigated from a peace proposal. Theory is reinforced with around the time when the poll first appeared the server was unusually stable for almost two days until it really ramped up again. Obv. because of a reported current poll result where an overwhelmingly amount of voters chose perma ban. probably 90%+. So they got more angry than they already were.
And the entire server is looking foolish for blaming Raven without a single proof or remote clue aside from a mere timely coincidence during a time where a lot is happening in the vanilla/classic scene and the RMT bans was also planted in the middle of it. Singling out Raven is extremely shallow minded. I'm not saying it couldn't be them, I'm saying of the three possible culprits Raven are the least likely.