Even without waiting to agree on rules, develop SRP protocol, and read through applications, there's an easy first step that can be taken right now which should at least purge a few bases:
Post a prominent announcement giving all base owners a certain number of days/weeks from now to report their base with proof of ownership and at least a basic purpose, after which unclaimed bases will be removed. A base that is not reported within a week likely means it is being silently supplied by individuals who couldn't be bothered to check the forums, in a ridiculously remote location, and contributing little to the RP environment.