Unsigned Message: Thats not satoshi...
satoshi would know that a signed message is needed if he is interested that his opinion is recognized
That would make that particular issue settle by his intervention BUT it would reinforce the point that if an authority can impose their opinion by their "status" then the system is broken.
It would create a precedent where in each dispute satoshi must say his opinion with a signed message which would in turn prove that BTC is centralized around his decisions.