Google Apps for education - stay signed in

It's unfortunate that Google will not allow us to turn off 'stay signed in' for Google Apps on student computers.

Here's a work-around. I'm using Chrome on the student computers. Go to settings - Under the Hood - privacy - Content settings - Cookies and check 'Clear cookies and other site and plug-in data when I close my browser' I can't think of any good reason for a shared computer to save cookies beyond the current session.