100% agree. Right now it's not a concern, but at some point the tech will be there and funds will have small allocations to hive without caring much about it.

A good starting point to find other defenses is Vitalik's Solution 3 in the blog. I'm sure we can come up with other ways too with enough time. But it's important to start thinking about this stuff.

Also, it might never be enough to be an attack vector, but will definitely be enough to cause some shitty governance decisions, like one bad witness or one useless proposal.