@ozzelot @f0x @zaire @kirby OS-level could be trivially done for bedtime already. Just add "/sbin/shutdown -hP 23:00" to root crontab and set a boot password.
I'd be more irked by the firewall implications, but I think a good UI for such things could be generally helpful as well. Personally, I'm still annoyed that plain old iptables was replaced by UFW and program specific rules.
Either way, good hacker training 🙂
