This post will show you how to hide the notifications in osx mountain lion.
open the notification center [click on the icon in the top right, next to the spotlight magnifying glass]
scroll the page down.
it will reveal an on/off radiobutton slider thing.
turn notifications off.

2 responses to “How to hide notifications in osx mountain lion notification center”
this is fine except that it will have to be done every day.
yeah, it only disables them for a day at a time!