Lucid session idle timeout is too short

I disagree with this. I do not see why it should be more than the bare minimum, for two reasons:
- Security. Screen locking is good.
- Power management: turning off the screen is good. Furthermore, the gnome-power-manager timeouts kind-of depend on the gnome-screensaver timeout, I think.

By your argument, why don't we lock the screen after 1 minute? How about 30 seconds?

- Security: I am not suggesting we get rid of locking here, I am saying that 5 minutes is too short. My screen locks all of the time when I'm simply sitting in front of my computer, not interacting with it.
- Turning the screen off is sufficient to save power, the lock doesn't contribute to this. I only want to push the lock timeout back, I still think it's fine to shut the screen off or active the screensaver sooner. It's a separate issue if this is currently not easy to implement, I am reporting a bug in the user experience.

We can probably change this as a distro setting.

Marking bug as triaged.

I'm thinking enterprise setting/coffee break scenario here. 5-10 minutes is reasonable, 30 minutes is an insanely long amount of time to leave a work computer unattended and wide open to any passerby to fiddle with. The default setting should be closer to a secure setting. Users who don't need security (ie: home users) can disable automatic screen locking or prolong the timeout.

This is similar in spirit to a no open ports/insecure services default policy, or a default policy of asking a password to log-in (ubuntu does offer you the option to autologin though).