Highly illegal. You can protect your privacy but not the others if they choose to. What if there's some life threatening situation and you can't use your mobile

Highly illegal. You can protect your privacy but not the others if they choose to. What if there's some life threatening situation and you can't use your mobile because someone has a jammer and don't realize it's the jammer making it impossible to localize, call or connect? Not good, while I'm open to the topic