Went over to HoBe for some 31 departures today. Got there a little before Noon, and spent about 3 hours shooting - I'll post some shots later when I've gone through them. I met another photographer there, a professional aviation photographer from Islip, btw, and we were shooting together. After being out there a couple of hours, we had a US Park Police car pull up to us. He was friendly, and professional, asked about our photography, what we do with it, etc. He asked to check our IDs, saying "You guys know why I'm checking." He called in our info, and after a few minutes returned our IDs and wished us a good afternoon and resumed his patrol.
Actually, when he asked us for ID, the other guy showed him an NYPD press pass. The officer said "Do you have any real ID, like a license?" I thought that was funny.
This is the first time I've had police come over at HoBe, and the first time I've encountered US Park Police. He clearly knew what we were doing, didn't try to intimidate us into leaving or tell us we couldn't take pictures of aircraft, and after a brief visit left us to continue shooting. All in all a pleasant, professional encounter - they should all be this way.