I've seen worse. Last year we had an actual riot complete with random property damage, looting, and injury over the loss of the Stanly cup. As much as it might cost my Canadian citizenship to say it, I'll point out the absurdity: 4.2 million in damages over a fucking hockey game. I'll take internet whining and charitable fundraising any day over that.
That said, as much as I'd like this nerd rage focused on something of real importance, it's nice seeing people not be apathetic about something other than Han shooting first. I mention that to point out that all this isn't new and won't go away. Heck, the existance of DLC has probably worsened things as now, we can conceivably compalin our way to a different ending. For me, there's also a happy foreward thought behind it all: a message that while me make consider games art, that doesn't mean we are willing to let the writers run over us with some artistic idea rather than continuity, logic, advertised features and fan wishes.
Silly, probably. but from the villification of used game sales, abuses of day one (and other) DLC, online passes, and other ways we as gamers have been inconvienenced or made to feel like criminals, some kind of massive blowback was inedivable. The idustry has had some serious entitlement issues about what it can expect from us, I guess some blew back on what we expect as gamers in return.