The problem with this is where do you draw the lines and how do you enforce it? For example I mod a community for a specific sports league. Should there be an instance for the one league with communities for each of the teams? Maybe an instance for the sport in general but then what if you have the same team names in different leagues. Or the same league name in different countries? What about if we wanted to group team communities under a geographic instances instead of by league or by sport?