I guess it might be a great tactic depending on your culture. I tried going with 24/7 silent mode, and then with no phone at all, but had to give in after being

I guess it might be a great tactic depending on your culture. I tried going with 24/7 silent mode, and then with no phone at all, but had to give in after being repeatedly badgered first by my coworkers, and then by my boss. They expect everyone to be available all the time, in every single company I know of (from friends/acquaintances). I still ignore most emails and phone calls outside of working hours though.