The barrier to entry for this implementation is a little over $600 USD. If someone brought this solution online in their apartment in midtown Manhattan NYC, they would potentially affect hundreds, if not thousands of devices.
Someone who is deploying an OpenBTS in the middle of the desert probably already has a good understanding of their existing RF environment.
I'm willing to bet that just about everyone participating here lives in an RF rich environment where if they brought solution online, it would impact someone.