Let's be realistic here. Was it seen that the two repeaters are located over 150 miles apart and the poster is using a low wattage handheld transceiver? True, if the interference were constant (ie: every time a person was on the air, and he didn't care) there would be an issue, but the question asked wasn't about that. It was simply about using a low power transceiver with limited memory spaces for two repeaters over 150 miles apart on the same frequency pair.
There is absolutely no way that the use of that transceiver is going to cause continual interference on the distant one--except in rare instances, and every repeater experiences that once in a while. The idea that a repeater owner has an absolute right to an interference free frequency pair is absurd. As someone said already, amateur radio is a shared service, and no one amateur has any special rights over another.