[not_your_vase]

Literally 8-9 lines of rm/shred commands (depending on how you count), asking you to run it as root (so it will clean the home of root instead of the user, without even checking what's going on -.-) or with sudo.

Come on, this is not even low effort. I'm sure you can do better than this.

[uws]

Thank you for your review. I have updated the script to mention running as the user with sudo. Some people use the root user for administration.

[not_your_vase]

  shred_and_fill "$HOME/.local/share/Trash"
  shred_and_fill "/root/.local/share/Trash"

If I, as a sysadmin give root rights to my user, and that user deletes my (real root) files, even from the Trash or anywhere else, then the next step includes such a level of violence that's not compatible with any kind of Code of Conduct.

[uws]

If you give a user wheel/sudo/root privileges, then they will be able to delete the root user's files regardless of using this script. I will consider removing this line and thus the required superuser privileges in the next release.