I succeeded at doing this to an old Asus Z68 motherboard. Steps:

  flashrom -p internal -r bios.rom
  ifdtool -x bios.rom
  python3 me_cleaner.py flashregion_2_intel_me.bin
  python2 dump_me.py flashregion_2_intel_me.bin -x
  python2 me_sigcheck.py FTPR_part.bin
  ifdtool -i ME:flashregion_2_intel_me.bin bios.rom
  exit # Skip this line if you're okay with bricking your motherboard.
  flashrom -p internal -w bios.rom.new

`lspci | grep -i mei` and `lsmod | grep mei` are now empty.

intelmetool:

  ME: FW Partition Table      : OK
  ME: Bringup Loader Failure  : NO
  ME: Firmware Init Complete  : NO
  ME: Manufacturing Mode      : NO
  ME: Boot Options Present    : NO
  ME: Update In Progress      : NO
  ME: Current Working State   : Initializing
  ME: Current Operation State : Bring up
  ME: Current Operation Mode  : Normal
  ME: Error Code              : Debug Failure
  ME: Progress Phase          : BUP Phase
  ME: Power Management Event  : Pseudo-global reset
  ME: Progress Phase State    : 0x3b
  ...
  ME has a broken implementation on your board with this BIOS
  ME: failed to become ready

It took a hard reset to re-enable integrated ethernet.

Awesome!