I couldn't tell you if there's precedent for that; I haven't looked. If so, it might just as easily support a counter-suit for IIED or NIED. I hope nobody files any lawuits; if they do I'm going to take a vacation from HN and stick my head in a bucket of water until it's over.
Still: there's a big gulf of persuasive evidence between saying someone is not acting in the moment as an effective representative for their firm, and in directly procuring the severance of an employment contract between them and their employer.
I think this case, or any case in the other direction, is extremely far fetched.
When I was a young internet evangelist I used to think that always-on internet availability would lead to a breakout of civil communication in some sort of 21st century Agora. Unfortunately, I overlooked the fact that people behave badly in crowds.