CIA: Hey Deschamps, let us work our MKULTRA on your orphaned boy. We'll give you his family's inheritance when he snaps.
No it is definitely done by the intelligence agencies. They also use electronic harassment. www.biggerthansnowden.com
The modern version is called gangstalking / targeted individual. There are several mass shooters who have complained of this.
They will hack your computer, break into your home and rearrange things, start rumor campaigns, sabotage cars, coordinate street theatre, etc.
That's not even getting into the v2k, induced dreams, etc. that you experience from electronic harrasment.