I would worry more about Noble House ruling Earth, which may lost its power over humans... but on the other hand I don't think that they can (are not able or the consequences of destroying rare habitable world are too severe) destroy Earth or kill all the humans.
BTW. I wonder why humans didn't show telepathic abilities earlier... I also wonder if human are capable of other psi powers (telekinesis, clairvoyance, teleportation, pyrokinesis, accessing computer networks, "you don't see me" Jedi/Larry Niven's "A Gift from Earth" 'invisibility').
And what about hypnosis?
*) Or is it Empire
