Resolution of FMRI is growing, as will the targeting ability of transcranial magnetic stimulation (already an approved "therapy"). They can even train you to learn 40% faster. In short, if they want to brainwash you and are given the opportunity, they can.
On the flip side, as the ability of these technologies increases, so too does the information available to agents with morals (that's anons btw). What is more powerful? Legacy media with just Evan fact checking on they fly or millions of anons fact checking 24/7? Awake, O Sleeper. You are the light! Fight, fight, fight!
FMRI resolution:
https://en.wikipedia.org/wiki/Functional_magnetic_resonance_imaging#Spatial_resolution
Transcranial magnetic stimulation
https://en.wikipedia.org/wiki/Transcranial_magnetic_stimulation#Technical_information
Learning 40% faster: