Why? I'm anal about security and this barely registers with me but not as something to be angry about.
Somebody with ring 0 privileges (a prereq for this) on your CPU already has root and you have to presume they've already had the ability to write to your BIOS and VBIOS, and this is just confirmation of that. If you're actually worried about this stuff then how can you be sure that someone hasn't paid Microsoft to put stuff into your firmware?
Step 1: Lease a Server for a month
Step 2: Compromise that server
Step 3: Cancel the lease
Step 4: Wait for it to be reused
Step 5: Next Customer in line is now compromised
Somebody with ring 0 privileges (a prereq for this) on your CPU already has root and you have to presume they've already had the ability to write to your BIOS and VBIOS, and this is just confirmation of that. If you're actually worried about this stuff then how can you be sure that someone hasn't paid Microsoft to put stuff into your firmware?