Jose wrote:

So, if it is a small airport, with no permanent TSA personnel, or
security
guards in place, according to the airport watch program, it is up to the
citizen to question people's presence on the airport.


Yes. But in a manner that does not imply that people's presence on the
airport is unwelcome. I think that was the OP's point.

Yes, we wouldn't want you to feel bad. That would be terrible.