Still... it would have been hilarious of the EmDrive had worked.
"Well, they've progressed! Last time we checked in on the third planet in this star system its inhabitants were still using warp drives to heat food. They appear to have realized this."
That's a good question actually. Supposedly this is extracting energy from the rotational kinetic energy of the earth. I haven't looked at the paper but you'd need to worry about conservation of angular momentum here.
Given that the cited physicists didn't dismiss this out of hand I assume this is accounted for somewhere...