And what do you do if the liars are good enough at lying (and powerful enough) to shout those "everyone else"s down?
An unregulated marketplace of ideas is just as dangerous as any other unregulated market.
Agreed: which is why the unmitigated liars need oversight to ensure they can't.
That sentence ends there, by the way. Can't lie, can't steal, can't find a medium in which to spread their heinous lies. Can't.
But it's also on us, as individuals to keep our critical thinking sharp to ensure that even when those liars find venue (cause they will, they are liars, after all.) we're smart enough to think "I should double check this, seems right, but not quite enough", and it's up to our respective governments and schools systems to TEACH critical thinking, and reinforce that teaching at every. *******. level of education. I don't care if you've three ******* PHDs already: to get number 4 you must take AND PASS "critical thought in the contemporary era" and "fool me once, shame on you 102". No exceptions.
And it's also up to our respective systems to find, treat and if necessary: punish the compulsory liars so as to discourage that kind of fabrications being used as means to accumulate power and wealth. There's a LOT of systemic reforms that need to be done: taking corporate money out of campaigning, limiting campaign finances, ending lobbying (in general.), psychological testing and revue for political candidates, civics testing for candidates, police background checks for candidates, ethics and morality testing for candidates, mandatory and RIDICULOUSLY STRICT truth in advertising laws. All of it needs to be public and VERY transparent: because the voting public needs to know WHY, the actual reason WHY candidate McGuffin has suddenly decided that the thing he's been working for since he was in high school is longer his raison d'etre.
If we want a system that actually rewards honesty, then we need to REQUIRE honesty from our leaders: even if that means they're being honest with a gun to their heads.