The part that is new, or at least recently en vogue again, is how this behavior is seen as a positive. It is explicitly encouraged by current social dynamics. It is even encouraged to some extent in academic or "intellectual" circles.
Also I will clarify I am speaking from a US-centric perspective. Are you not in the US?
I have seen multiple academic circles seriously come to the consensus that innocent until proven guilty is not good as a general principle. This sort of thing IME occurs on mailing lists or in department meetings, and it has also ramped up considerably in just the last few years. I've never looked for literature on the topic, perhaps the institutions I am affiliated with just suck. But given the many others reporting similar sentiments I suspect there will be some literature on it as a broader phenomenon, at least in the US, down the road.