This is a proposal for a consistent profile system, not for anything to do with follower counts. Profiles are kind 0, which this proposal is talking about. Follow lists are kind 3. There is no way that YOUR profile, which requires your private key's signature to be updated, can be modified to list that someone else is now following you when THEY add you to their kind 3. Not, at least, without some mechanism to ask you to sign for the update. 

 Yeah, I misinterpreted that as fixing the problem of follows getting nuked.