Similar to the problem experienced by the poster at Why do so many airports have the same CTAF frequency?, I have noticed that my CTAF is crowded. Not with local pilots, but with operations as much as 100nm away. There's little benefit to knowing that there are skydivers jumping in the mountains when I am an hour away in the plains. Likewise, hearing someone on downwind for an identically named-runway but on an island out in the ocean is, well, distracting.
I asked the airport manager what it would take and he chortled out, "An act of Congress." And he might well be right!
Does anyone know the procedure for getting a frequency changed? And can the 25kHz spacing be used or is that reserved for ATC and ATIS/AWOS/ASOS channels, which are, respectively, redundant or non-critical?