The phenomenon I hadn’t properly thought through before is that a group may be more densely connected out-of-protocol, so its actions can seem magically coordinated if all you can see is the messaging traffic in-protocol. Like spooky action at a distance via entangled particles.
I like calling this property of a protocol “side deal proof equilibrium”. A protocol should be safe in spite of any level of external bribery or coordination. https://academic.oup.com/qje/article-abstract/124/3/1307/1905159?redirectedFrom=fulltext
Online & onchain social graphs are not representative of meatspace social graphs, and vice-versa.