But we're not reddit - and we don't want people isolated or marginalized in little groups, we also want exposure for issues surrounding those groups - but we also want people to use comms. The only way I can see to merge these two things is to have all comms subscribed to all people by default. That is, make them opt outs rather than opt in.

Then comms are for sorting posts, and avoiding certain topics if you really don't want to be exposed to it, but not for marginalizing groups.

Or maybe I'm wrong about the goals of the site and the purpose of comms.