Yeah, you see this everywhere -- "filter bubbles" and all that. People have been trained to expect protection from anything that even vaguely intrudes on their own sense of self-righteousness, and consider this breach the failing of Someone Else (TM), generally the platform operator (whether that's an employer, school, webmaster, mailop, etc.).

People expect a mechanism to first, punish the offending author (block, downvote, whatever), and then hide the offending content, and they refuse to engage on any platform that doesn't accommodate this. Not only that, but they often seem to try to destroy the platform for allowing the travesty of frank and honest discussion to take place.

There's a part of me that believes the restrictions of the physical world are really necessary for a productive dialogue. You can't stop anyone else from showing up, and the limits of dialogue are how far you can go before someone is throwing punches and you're both getting hauled off to jail. It seems to have a much better track record of producing acceptable middle-ground outcomes than "flag, block, ban".