Not sure what the solution is, besides regulation (which would be extremely difficult).
The solution is only difficult if you start from the basis that Facebook must continue to exist. If they cannot run a profitable business that isn’t harmful, that’s noone’s problem but theirs.
>>goatin+(OP)
I would love to see Facebook labeled as a domestic terrorist group for how much they have aided and abetted, and sanctioned accordingly. Make it illegal for companies to do business with them. You don't have to shut them down, but if you make it so they can't earn enough to survive, then oh well. Sorry, not sorry, you're business model wasn't a good one.