I posted this to alt.poly yesterday, in the course of a long thread, and two different people said they like the phrasing, so I'm putting it here for future reference (mine):
To the extent that there are politics entangled in my polyness and my bisexuality, they're about people being able to live, openly, in the ways that work for them/us, with the partners we choose, whether none, one, or more than one, and of any gender. That's an aim, not a tool to create some changed world.