I'm a free speech purist. I would rather know that absurd blather is allowed and can be disregarded than to have one's speech stifled.
I think most people's disdain or frustration, comes from the fact that they themselves are stereotyped or pigeon-holed based upon assertions and statements made by others who share most of their same interests and views. I guess everybody's tolerance level of behavior and topics with which they disagree is different.
That's just my take; but, I acknowledge I am one of the forum mornons.