Is the argument for in-wallet encrypted messaging sufficiently compelling to justify the cost of a hard fork and a permanent inflation of the block chain?
Ofcourse not.
But who knows, maybe Mr. Spread has got some sort of craaaazy new fork system in preparation...

Not like darkcoin's
spork which is the most centralized way of forking thinkable (giving ONE man control over an enforcement mechanism),
imagine what a decentralized forking system would look like.

My mind is boggling...
All the Decentralization makes my head spin, I need to lie down.