I mean, why is it a problem for the screensaver to turn on after 15 minutes of inactivity. It's not your computer, it's the company's. Why do you care if the screensaver turns on if you aren't using the computer? Are you just so full of false laziness that you can't be bothered to type in your password a half-dozen times a day? Maybe someone at the company cares that someone could sit down with your user account and pretend they're you.