The blown fuse with tag would be "tag out"
Got a disconnect switch? Or do you just grab the fuse live with your bare hands?
If actually dealing with a dangerous situation, locking out power to the entire fusebox would work.
Since your concern is someone reconnecting the fuse while circuit is being worked on, just rig up a wire to ground the hot wire. If someone does insert a fuse, it blows and no harm done.