Just document as you go along.
No, it did exactly what you asked it to do. Not it's fault if you didn't think things through.
If you use -I with the rm command, the system only asks you once.
Well, there are many ways to hose Linux -- as root.
But if you routinely run things as root, you deserve what you will eventually get. You're basically saying "Yes, I know the gun is loaded, but I want to muck about with it anyway just to see what happens."
That's why sudo was invented. If you have to sudo the command, you'd best understand what you are doing.
If you are operating as a standard user on a well-managed system (i.e. one with quotas, limits, etc), there's little you can do to screw up anyone save yourself.
As root ? You can delete the entire file system, destroy the volume manager information, reformat hard-drives, just about anything.
My favorite way to hose a Linux system is this: Doom
Original Doom on Linux modified to attach the process ID to each monster. Kill the monster, kill the process. :cool: Walk into a crowded room with the BFG-9000 and let it rip.