Do I want regulations that would prevent things that are illegal to say on one media form to apply to all? Sure. You can't just go buy a TV ad that says "blue cars cause cancer", knowing that it will drive business away from a guy you hate that makes blue cars. But I can go have that facebook ad up in 5 minutes.
As part of living in a society, I am happy to cede some freedoms for a better world.
I mean, it'd be best if the government did this and was held accountable in terms of censorship in all the normal ways they are - but Facebook decided to adopt the responsibility to be the one who needs to control it... so they made their own bed.
I think this is a more complex issue than some make it out to be.
That said, if you walk into a restaurant and start yelling about something, they can absolutely kick you out, because it's a private company, not the government.
As part of living in a society, I am happy to cede some freedoms for a better world.