The current licensing and band planning done by HAM operators & volunteer coordinators is 100% necessary for the cooperative use of the HAM bands. I think many probably don't realize it, but this website is doing a decent job of that for GMRS, whether intended or not. Allowing us to post our frequency use and coordinate with others around us does some of the job of those frequency allocation volunteers, be it passive or active, either way we tend to not want to step on each other. GMRS is a small band and there's not much room on it so this serves a really important roll. I've noticed even on CB; people will use self-appointed handles and even have use specific channels, there are unspoken rules. Seems like those who use radio have a tendency toward coordinating and cooperation, similar to what is followed by ham operators.
All that said, I think GMRS users should agree that GMRS use should be limited to one of if not the final circle in your encompassing circles of communication. Meaning GMRS should be used in and around your community. In my head this basically looks like this: GMRS/FRS Simplex around the neighborhood, GMRS Repeaters for the community, 2M/70cm for community to community, 10m/CB/6m for county wide, and you're looking at a general ham license for anything beyond that.
Sorry if this is a bit of a rant, I've been thinking about this for some time and needed to get it out.