If someone goes to the trouble of implementing an efuse, they will also implement the check in the hardware so it can't be bypassed. An easy example is optical

If someone goes to the trouble of implementing an efuse, they will also implement the check in the hardware so it can't be bypassed. An easy example is optical drives with fixed numbers of region switches that refuse at the hardware level to read discs from the wrong region and also refuse at the hardware level to switch regions once all the fuses have been blown.