“Maybe they’ve stopped visiting us precisely because there are now too many ways they could be caught on film (or in pixels), and they prefer not to be seen (for the obvious reasons).”
I agree with this. I caught images on my digital camera that I had no idea where there until I got back home and enlarged them on the computer. My old film type camera never caught anything like this. I sent the pictures to MUFON and they verified they were not fake.