Except that the release of toxic or radioactive substances cause definite harm, as opposed to walking around without a mask, which doesn't cause harm (unless yo

Except that the release of toxic or radioactive substances cause definite harm, as opposed to walking around without a mask, which doesn't cause harm (unless you assume all people are sick and/or everyone carries viruses and are vectors to transmit them). Also, masks are proven to not be effective to protect the spread of viruses, according to the CDC.