Can I get one which identifies people that post on FR so I know to avoid them as they're likely to have guns that could accidentally go off and kill me?
/sarc
Mine have never accidentally gone off. But I could claim they did. A gadget like the one you are mentioning would be as reliable as a lie detector. Would you be willing to risk your life on such a gadget? As for a rose tint, I had a pair of $5 rose-tinted sunglasses in the sixties, a lot cheaper solution than a gadget.