Auto Logout Virtual Console on Inactivity?

Prerequisite knowledge:
virtual console - Platform-specific Desktop Tips

A virtual console is easily forgotten and left logged in. Specifically when switching back to another virtual console such as tty7 running X Window System.

For Kicksecure hosts and Whonix-Hosts it might make sense to auto logout after a period of inactivity. What do you think?

What would be a good default timeout period?

Does Debian or Qubes come with a default logout period for X Window System? Qubes ships xscreensaver by default? But does it lock the screen by default? After how long timeout period?

Should also check default screen lock settings for X Window System. But for that we better use a different forum thread.

Useful in context of:

Related:
Should (lesser) Adversaries with Physical Access be part of the Threat Model of Whonix / Whonix-Host / Kicksecure?