Obviously, if you have more than one person who wants to feed the same site you could work together to decide who will send what.
Maybe one sends county one sends city?
One sends fire, one sends police??
Etc...
This could also help if one node picks up a transmission that the other misses for some reason. I do know that the Calls platform is able to filter out duplicate transmissions that are sent in. This happens a lot with statewide radio systems that are carrying the same traffic on multiple sites.