Comment 39 for bug 1033226

From my perusal of the comments, I don't think anybody has mentioned this particular option yet.

Restart -- Remind me later -- Don't remind me again

This might be a good short-term solution. As discussed, there's a tricky balance with how long you make the interval between repeat nagging, and making sure the user is actually reminded. With this proposed solution, the user opts in to whatever repeat nagging interval we set, but also has the option of opting-out.

I also agree with the comment about the shutdown menu button (top right of screen) becoming red acting as a more subtle reminder.

The current behaviour it far too reminiscent of Windows update suddenly getting in the way (and threatening to reboot in 30 seconds) during the middle of a presentation.