It's not much, but it's what I can do:
I promise not to attend PAX, ever again, in any capacity.
I promise to advise my peers and colleagues not to attend PAX, ever again, in any capacity.
I promise to help organize / build / support new institutions and communities, to try to replace PAX and counter its owners' poisonous influence on its fans.
I can't promise that my actions will matter. They probably won't matter. But that's partly the point of a promise.