I don't really get this. Setting interruptions to "none" stops my phone from beeping or vibrating, but I can still see notifications popping up. I thought the point of this was to hide incoming notifications completely?
I don't believe the point is to stop notifications, the point is to stop alerts. Your phone still gets notifications. The only way to stop notifications II believe is on a per-app basis in the settings. I am not aware of any way to stop your phone from getting all notifications globally.