You misunderstand. Responsibility cannot be avoided.
- power's out at your house. You should have bought a UPS.
- internet's out at your house. You should have a router with a backup connection.
- security exploit in the wild. You should have configured automatic updates.
- update repo changed URLs. You need to change the config.
- you enabled open signups, and now strangers are distributing MP3s from your images directory. You need to kill those accounts and change the config.
- you let your cousin have an account, and now he's in a flamewar with half of Australia (which he thinks is Austria, and also he believes is ruled by the Illuminati). You need to shut that down and talk to other admins about getting off of their blocklists...