no. the kind of person that uses this is just as inconsiderate as the fool yapping away on his cell, if not more so. You are in a public place that you share with other people. Who are you to dictate what other people can and can not do? Using a cell phone jammer is incredibly selfish. What if you are dining next to a doctor who is on call, and your selfish desire to stuff groceries in your maw without hearing other people causes her to miss a life or death call?