It will have to be up to the communities in question. For some, it won't really matter; for other communities, it will be absolutely necessary. For those people

It will have to be up to the communities in question. For some, it won't really matter; for other communities, it will be absolutely necessary. For those people, it will be necessary to have some sort of provable means of identity. It will also be necessary to enforce sanctions on people who violate the trust of a community. The stick needs to be equal to the task of driving people toward the carrot.