From what I've heard, spotting is not very welcome there. There are a few shots in the database, it would be interesting to have some feedback from the spotters...
I went to the Ikea parking lot and spotted for a couple of hours. A black Suburban and a very fit person was watching me. After a while he circled round my car a couple of times and I guess he called in the number. I decided not to continue and left. I don't want to get into trouble for spotting and ruin it for the others. I guess I shouldn't have taken the picture of the Air Force One chopper heading to NYC.