Being that Hive is a fork of Steem, they are already elected witnesses (if you check the witnesses page rn you can see witnesses supporting Hive by running version 23)

The only qualification for blocking people with "different think" was if they "voted a minimum of two sockpuppets and didn't unvote before the hive announcement with more than 1k sp"

Also, you may not be aware, but excluded accounts would be able to get the airdrop if they submit a proposal on hive and the community agreed to give it to them.