Earlier quoted context omitted.
I thought you can in C2D (Nehalem?) era ThinkPads? https://libreboot.org/ and you can minimize ME in Sandy and Ivy Bridge, using ME_Cleaner? edit: according to sounds' comment* in HN (2016), The ME is purportedly placed in "recovery" mode [*] https://news.ycombinator.com/item?id=13056997
Minimize != Disable.
https://libreboot.org/docs/hardware/gm45_remove_me.html
after that it's impossible though.