Fact checkers are necessary because otherwise people will believe a bad thing and commit crimes? Committing crimes like threatening people is not the natural outcome of the freedom to decide for yourself what you believe.
I'm not sure the term "natural outcome" is very meaningful. Things either happen or they don't. It's a possible outcome and possible enough to merit discussion.
But let's take bad effect down a notch, from a crime to just an unpleasant consequence if you want. Let's say instead of getting doxxed and physically threatened, you just get turned down for a job offer instead. What about that?
