This is a pretty good example of the sort of social interaction that makes me want to stay away from social media platforms.
It's not a fear of saying the wrong thing and getting fired... it's the fear of saying just about anything at all with such a huge megaphone attached to your mouth (and the fact that your shouting will be recorded forever.)
HN comments are about the closest I'm generally willing to go to that sort of ultra-public commenting, and even then I'm generally pretty careful. Some people seem very cavalier about it.