If an account has enough RCs, they can do however they please. Your need of trying to "manage" how people use Hive isn't going to scale well. Hive is a database and you can be sure that app-owners will not tolerate anybody telling them how they are supposed to use that technology as long as they or the users' pay for RCs.

The only valid argument I can see is that dbuzz is automatically voting posts, but even then, this is a valid way of incentivizing ppl using the dapp.