Most of the pictures I take are where there is no one around, and others are those that I am asked to take to support the hazards others find. I even offer that as a service.
I have been writing articles in EC&M that covers this also.
I also receive many images and stories from readers and from people who visit our web sites.
I was caught once in a Kansas Holiday Inn in the kitchen taking pictures, and was asked to leave the hotel.
I did, but later sent a message to the manager (who was the installer of some of the misery) advising that he had some serious problems.
I will come back, and add some of those hazards here when I locate them.