Hi,
You may consider NOT RECOMMENDED equal to PROHIBITED. It does not matter... If you use this EMU, you are using it at your own risk. EMU was tested and is not recommended (=prohibited). At the first moment, it seems working OK. But after some time, it becomes glitching with all consequences arized from its work. As a result- you will have ban.
So, I think, the question about not recommended or prohibited is not reasonable.