And on that topic, I didn't remember that Clay Shirky's (now classic) essay A Group Is Its Own Worst Enemy references Bion's ideas so heavily. In particular, he runs through Bion's three patterns that groups enter when avoiding a more sophisticated purpose: sex talk; identification and vilification of external enemies; and religious veneration. (These are archetypes of more complex behaviours that you'll definitely recognise.)
So these are human patterns that have shown up on the Internet, not because of the software, but because it's being used by humans.
In A Group Is, Shirky defines "social software," examines it, and sets out what to design for. This essay is nearly 8 years old and I'd forgotten how detailed and foundational it is.