However, an equally ridiculous set of assumptions can be used to take over a PoW chain. So this is not anything specific to PoS, it is social engineering attack mixed in with mass hypnosis. Why not simply the attack where you ask everyone to just send you all their funds? That would work too
What you call 'ridiculous', I call rational behaviour.
The OP shows one example of how this could be profitable, so 'economically unviable' is also unjustified.
Do you want objective analysis, or just unthinking agreement to whatever you post?
If the latter, you can always make some sockpuppets. I just respond with my analysis using the meager resources at my disposal. And to my simplistic thinking, postulating an economically motivated attack that assumes all the victims will mindlessly just give the ability to attack is essentially the "send me all your crypto" attack. Hey, if they do, it works so it is rational and viable.
James