Ask for confirmation before proceeding

Given that ABAN is extremely destructive by default, it should ask for confirmation before proceeding. And a hard requirement for confirmation should probably be a default.

I.e. if you want it booted in the (currently default) destructive mode, then the user should probably have to pass some non-default option, akin to apt's "do as I say".

The bottom line is that you want to avoid getting messages from users saying the likes of "I booted your boot disk and it wiped all my important stuff, you ."

Question: does it do anything if not booted in the currently default destructive mode? If not, you could consider adding an interactive option, where the user can select which disks he/she wants to wipe.