Is it possible to track the signal of the radio? History and modernity of the question

Almost all the forums devoted to radio, periodically the question arises whether it is possible zapelengovat a working radio. The most “advanced”, who still remembers the basics of physics, the answer is that it is possible because the receiver has a local oscillator that radiates, others say that is impossible. The question was relevant 30 years ago, when people secretly listened to “voices”, but now you can hear horror stories about that if you configure the receiver on the “militia wave”, the owner immediately come.

So can we or not? Try to understand and experiment.
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When the photos are proof?

Original taken from apxiv in When the photos are proof?

About the epic debate that has unfolded in the comments to the post are Investigating the simulators NASA and the trick of Copperfield, will lead a figurative comparison. For example, steep experts made very high-quality photos and videos with a plot: “Igor Greek on the moon watching the Earth rise”, “Igor Greek on the ISS in zero gravity in acrobatics and Igor Grek in the open space to show off like a worm on a hook, imitating the first postprogram Leonov and white.

Post in LiveJournal and ask the question how is this done?
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