It’s not “the negative interactions of the few” when you have thousands upon thousands of people jumping into the latest issue of the day. Usually they’re people from all over the world, without any access to context or more information on whatever is going on, which means there is no room for analytical thought - you watch the events unfold from afar, without interjecting, or you join the mob. See the recent basecamp controversy.
You’re intentionally ignoring the evidence as “not the majority”, “the lazy”, but it’s a fact that this is happening, and happening on platforms like Twitter and Reddit. We didn’t have this on Usenet, forums, news sites or any other previous media tool - it is evidently a product of social media, it’s format and reach today. The existence of this phenomenon was not even in question in the article, the point is how to interpret these events.
Those quotes are not statements of absolute truth, but the author is trying to paint, in broad and colorful swathes for illustration purposes, the mentality that emerges from this phenomenon.