I do think businesses should have the right to block cell phones, but I don't think the technology is good enough to ONLY block it for the business, the range on the jammers don't care where the business ends and the sidewalk begins.
We made it many many many years without cellphones, I think we can make it 20-30 minutes a day without it. If you have someone in the hospital, Don't go in a no cellphone area. Simple as that. Yes I have a cellphone for emergency only, If I want to go see a movie I turn it off.
Another alternative would be a signal sent from a base location that turns the ringer off on all cellphones and vibrate on. Instead of jamming the signal it just changed a setting which is put back to normal when out of range.
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“It is better to be rich and healthy than poor and sick” - Dave Barry
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