They can't yet; but the plan is to allow it later. I need time to understand what's involved in building a community and maintaining it so I can put the right governance model in place. For example, if someone creates a community, do they get the right to censor it? Who decides what's considered spam and what's not? Voting or the admin? Things like that.

I think you should plan on making that a feature ASAP. My interest level just went down when I read that it's not available now. Giving people the tools to create a community is a very powerful concept.

I think your idea could really work waleedka, get that feature out now and refine it as you go.