Did you mean to say "Negative Energy" here Avi, as it looks out of context, disconnected from any previous mention of negative energy of yours.
I tried to follow your link to the paper of Stephen Hawkings, so as to confirm one way or another but the link does not work for me.
Reason it matters is that we have to call energy extracted from the planet negative because it really is mathematically negative, subtracted from the planet, as opposed to positive, added to the planet (Only from the sun).
Whereas, if interpret correctly, you are debunking some hocus pocus :)
We wouldn't want any of that to be connected with what is an existentially important, if newly revealed harsh reality that we have to not only understand, but apply effectively.
Could you really have been meaning to say negative mass, where you said negative energy?