And this video, they were Watching after dark. Any police officer would have been suspicious of any activity at that time of day. I might also note that at least one of the officers was curious about train watching. He asked if you could identify equipment and other things.
In another, I was going to the office of the RR. A railroad security came up, in his car, and told me that I was trespassing. I told him that I was just going to the RR office to see their policy of picture taking and trespassing. He answered that there was no one in their office, so I turned to leave. His first question was where I parked, which was in a public parking. As I was leaving he followed in his car but we continued to talk. He told me where the trains were and were the best place to take picture.
Yes, they do check us out. What about other people. They seem to treat us the same. They are even friendly when we are.