These containers are among the easier ones to spot. It is pretty easy to tell that a plain utility box designed for indoor use when stuck onto the side of a lamp pole with a "Caution, high voltage" sign is a phony. Certainly hides should not be placed inside of live electrical equipment, but when you see a suspect utility box, switch cover etc. ask yourself whether or not this is placed in accordance to code, whether or not it serves any function etc. If you do not want to deal with this kind of hide, upon finding one, walk away.