Unfortunately, U.S. airports (especially the larger ones) are becoming more and more patroled. I used to frequent airports like ORD, DTW, JFK, etc... and no longer do so because of unpleasant encounters with the "airport gestapo". This topic truly makes me SICK, because 10-20 years ago, the majority of these airports were places you could take the family out for a picnic and watch planes without being harassed.
The majority of my spotting now goes on at smaller, less frequented airports like DSM, OMA, and MCI. Even with this group of airports, the only one that is spotter friendly is DSM.
I just wish something could be done, because if we are standing off of a PUBLIC road watching planes, we are not breaking any law that I have ever heard of. As long as we are not on airport property, we should be able to enjoy our hobby in peace.
Just my two cents.
To most people, the sky is the limit. To those who love aviation, the sky is home