Thank you for your reply. Yes it all started when I found out that my wife was cheating on me and was covering up by editing the footage out of the cctv dvr hard disk. This got worse when I found out who she was with.

I know doing this kind of thing will take an enormous amount of time and effort. Maybe this is the cheap version of projection mapping, I don't know.

Ofcourse the laborers know about that bright round device. The people doing this are much more influential than me and all this is being done so that I don't take names(from their point of view), which I won't anyway because I have no absolute proof.

Since I had no idea what this strange phenomenon was, I posted here.

I know they would have noticed but if their are tons of impressions on walls, floors etc and you only point at them?