The books final chapter concluded by explaining an experiment they did where simply by showing a particular image in the background, combined with a spaced follow up and increased incentive, they were able to sucessfully manipulate people's political and voting preferences in a manner that lasted over a year.
I decided at that point no one gets to screw with my subconscious but my immense amount of childhood trauma. In my mind every other reason pales in comparison to this one for why I adblock and put it on my wife's computer, and every computer a family member owns.