I wish that open hardware (CPUS specifically) were more popular and closer to the market. RISC-V is still quite a long way off for everyday use (though I did see a risc-v based arduino thing, which is nice)
1. They would have to respond publicly (to the general public not just dev community).
2. Somewhat less satisfyingly I expect their first action wont be to issue some kind of widespread automatic disarm of ME, but instead just patch it.
They are unlikely to receive the message as "this is insecure by design" and more likely to interpret it as "there was a small bug in out very marketable management engine, we will patch it and all will be fine in the world". Unfortunately the general public wont appreciate the difference and perceive intel to have had a "hicup" which is exactly what intel would want of course, because it's the same general public which make the biggest dent in buying up all those intel-inside stickers.