Proof

It can be shown that many paranoid schizophrenics are in fact misdiagnosed mental technology abuse victims.

Consider mental ventriloquism, the art of making it appear as though voices are emanating from the walls, tv's, etc. No voices have been observed fumbling about learning telepathic arts as you would expect if they were growing up in the backs of people's heads, they are arriving and initiating attacks well trained at arts like mental ventriloquism. This can be verified by examining the historical record of targeted individuals and paranoid schizophrenics on the forums they go to. Though there may be a sudden rash of lies in recent time due to this statement, I haven't seen a single account suggesting that voices are growing up in the backs of people's heads. Therefore paranoid schizophrenia likely does not exist. If paranoid schizophrenia does not exist now then why did it disappear? It seems reasonable to assume that it never did exist. If it never existed then why are there pre-electronics era cases of paranoid schizophrenia like voices and visions? There are also historical accounts of demon possession that also coincide with paranoid schizophrenia like symptoms. Alien tech, spiritual culture.