They already do this in cities that the local affiliate is network owned and operated. That's why CBS was pulled from TWC/BHN, but not all cities, when there was the dispute between TWC and CBS. The retrans agreement is between the station owners and the MVPDs, not between the network and the MVPDs. I've heard this argument several times. Supposedly it's not possible to pick up a signal with that small of an antenna, that many working together is "technically" "one" antenna. I'm not an RF engineer so who knows.