Given the time many spend in airport lounges it really isn’t feasible to ban telephone calls. People often talk louder because the line isn’t clear or the others voice seems low so the reaction is to shout. Have a heart for the pacers those that pace around while on the telephone, it may help them think if they are on the move. I am a doodler and I would be appalled if someone took my pen away.
However loud chewing should definitely be outlawed 🙂