The most feared words you can hear
I'm from the government and I'm here to help you.
The FAA have an 'interesting' view of where their authority stretches to - probably because many (most??) airports in the states have been in receipt of grants for infrastructure improvements. The rider that comes with the grant is that it gives the FAA a huge amount of say in the ongoing activities at the airport. This is often a good thing when local governments try to sell off a local airport to generate money and find that they can't. For subjective values of 'good' of course.
I rather suspect that attitude is being shown here despite this not being an FAA funded operation.