So if someone were to hypothetically be taking a brake disk off and hypothetically manage to round off the inside of the aligning bolt so as to not be able to remove it... What would you do to get it off!?
As welsh_z says Drill it out, Or centre punch.
Had this happen a number of times on various motors. They are not really a necessity just a nice to have. I always copper slip them when replacing and never tighten them overly hard.