I don't like the mob thing either but it's how large group dynamics on the internet work (by default). We try to mitigate it where we can but there's not a lot of knowledge about how to do that.
A lot of people who are stomping mad are mad because they think, for example, that you personally flagged #Thing and don't realize that's not how that works. A lot of that -- the best antidote is calm, cool education without getting cranky, etc.
In my experience and similar provisos.