When an application is in fullscreen mode, empathy should not show complete chat messages osd

(sorry for my poor english:-P)
- When i'm watching a video fullscreen, there's likely someone else with me.
- When evince or libreoffice Calc or Impress is in fullscreen mode, it's likely that i'm doing a presentation in front of some audience.
- other situations...

In these cases (and other could possibly come to mind), i don't want other people to see my personal communications, i.e. the osd notifications that empathy sends.

Instead, i would like empathy to show something like "a new IM message has arrived (from a Facebook friend)", so neither the name nor the actual message would show up.

Also, empathy status could change to something like "do not disturb".

What do you think?