Yeah, I did give it some thought a few hours ago, but I was unable to come up with a workable solution 
I suppose martians could prioritise an ASIC foundry and manufacture a proprietary implementation of some new proof-of-work.
It might leak to Earth, but hopefully by then it will be "too late"? :p
LOL, yes: Eventually Mars colonists will overtake Earth anyways - they are closer to the Asteroid belt and can 3d metal-print giant scrypt-ASICS. Puny Earth network will shake in fear :-) The first interplanetary war will be about hashing power, I suppose martians could prioritise an ASIC foundry and manufacture a proprietary implementation of some new proof-of-work.
It might leak to Earth, but hopefully by then it will be "too late"? :p
