Solution: If you don't want it up to your particular big name vendor, build your own system. You can bet the full UEFI spec will be implemented on Gigabyte, Asus, MSI, and other boards, where you have the choice of disabling the secured boot environment.
Also, the pre-boot environment in Windows 8 clearly allows the booting of "Other OS."
And who is more selfish, the person whose life we're talking about, or the ones who want them to endure the pain for their own personal satisfaction? The selfish cowards are the ones too afraid to face the result that they selfishly want you to go through the physical pain so they don't have to go through the emotional one.
Yeah good argument, but it still has nothing to do with who has the right to this person's life. Who else would have more right than the person themselves?