"Non-local action" is a good expression, it covers such instances of magical influencing as TV-news and the like. TV-news creates a believable image of events, and this image affects the actual events and actual persons on the spot where the news-event has taken place. Magical or non-local influencing can actually change the perceivable reality. Especially, as TV-news are believed by hundred millions of people, it can change and affect reality.
Often the people, who by chance know what actually took place, become alienated from their own experience. But it depends, some people are used to the artificial or synthetic reality, and some are not. The social control usually demands that all normal and good people accept the TV-news as truth, i.e. that certain persons must give up their own experience of truth.
It is not the electromagnetic signals but peoples minds and their mental formations.
That's an interesting analogy but I wouldn't completely equate media influence with magical action.
This essay on Kurukulla by John Reynolds has some interesting information on magic in Tibetan Buddhism:http://vajranatha.com/teaching/Kurukulla.htm