My original question was about places in the world where blockers may be legal . Work places , schools, churches, places where land lines are in place for emergencies are some places that come to mind. Never meant this thread to turn into a fight over cell phone use out in public. Some employers do require workers to put their phones in lockers at work. Some just can’t resist the temptation to respond to texts. Many jobs require undivided attention and the honor system doesn’t seem to be working.