Google's decision to be the arbiter of acceptable speech will be its undoing.
The social media giants' problem is that they want to have their cake and eat it too. They want the editorial control, and they want to be absolved of any liability when they host terrorist propaganda (think ISIL), pedo bait, and other garbage.
There's also the recent court decisions regarding politicians' usage of blocking. That ruling creeps right up to the line of recognizing "private" social media providers as a public square of sorts. The situation we're in is not tenable for much longer.
The end result would be a choice between a troll and spam storm or precurated everything.
That aside, the one worry I share is that the outrage is going to drive a legislative solution that ends up splitting the baby and sucking for all parties concerned. I was entirely serious when I said this situation wasn't tenable, though. Too much emotion/polarization/etc for something to not give soon.