Yes, you this is so, but. just imagine:Disks can be remove without any confirmation - but this removes the disk only from the VM configuration but the disk is still here as "unused".
So you add it again via add hardware if you decide to use it again.
If you want to remove the disks physically, just remove the unused disks, then the data is removed.
I'd try to explain using screen-shots:I do not get your example. we already have a two step removal and we will not change this for 1.x series. But I will see if we can get a better warning message in the 2.0 interface,
thanks for sharing your thoughts,