I'm not an expert, but I think that they wouldn't have a choice, since they would be outnumbered, and no one would recognize the legitimacy of their new bitcoins. Having 51% of the hashing power doesn't give them 51% of the vote when it comes to this community decision.
taxation without representation...
Things like votes are attempts to make it so, but as a practical matter if you only get to vote between a few choices created by blocks of power in which you are not an elite (i.e political parties), your vote cannot possibly reflect what you want in any meaningful way.
Tragically, people are so used to voting between choices other people set out for them that they delude themselves into thinking that they are being fairly represented, and that their beliefs really should line up in one of a few belief-bundles determined by team names.