Statements fall on a spectrum between pure opinion and incontrovertible, undisputed fact. Somewhere along there is a threshold where it's no longer about agreeing with something.

I'd say it's impossible to do a perfect job of finding that threshold, but I think Twitter has done a decent job of it with Trump's tweets.

But yes, as it stands right now, it is in their hands and we are relying on them to do a good job of it when they decide to.