1. A computer-implemented method, comprising: associating, by a processor, one or more individual feedback ratings with a plurality of users in an electronic community, the plurality of users including a particular user, one or more first descendants referred by the particular user to the electronic community, and one or more second descendants referred by the one or more first descendants to the electronic community; deriving, by the processor, a community rating associated with the particular user by aggregating the individual feedback ratings respectively associated with the particular user, the one or more first descendants, and the one or more second descendants; and storing the community rating associated with the particular user in a storage device.