Scare story?
Is this a scare story put out by M$ to frighten people into not disabling "secure boot" and so not installing Linux?
If the Linux installation in question is being used for some industrial purpose then there will be physical ways of preventing access to it.
If it's a laptop then for someone to be able to do this they have probably stolen the machine first. In this case the owner has bigger things to worry about, the thief will probably give up once he sees that it doesn't run M$ and the operating system is not going to be able to defend itself anyway.
So the protection is (1) only buy a laptop that is only as powerful (expensive) as you actually need, (2) encrypt your private data and (3) keep it backed up elsewhere.
Biting the hand that feeds IT
