I have work in and around the industry for many years. Nuclear, radiography, hazmat and radioactive materials etc. I started trying to confront some of these outrageous comments on here only to find its a futile attempt of a long winded reply of actual facts its not worth my time after seeing, Oh yeah read decoding symbols is referenced as some proof and valid source. Sad. And you are right seems to be a effort to slide against actual info on these things, ive noticed this as well for along time.