Roscosmos chief Vladimir Popovkin insinuated the loss of the Phobos-Grunt spacecraft was because of American sabotage, echoing an earlier accusation that radar sites in Alaska are deliberately downing foreign spacecraft. For one thing, the high-frequency phased array radio transmitters that are part of the High Frequency Active Auroral Research Program (HAARP) just don’t put out that much power. A spacecraft would see orders of magnitude more from the Sun itself, especially during a solar storm. HAARP seems to be the center of a number of conspiracy theories, supposedly responsible for causing earthquakes, hurricanes, and chronic fatigue syndrome. You’ll pardon me if I don’t accept Jesse Ventura as an expert on that.
Second, we test everything for electromagnetic interference/electromagnetic compatibility (EMI/EMC).
Circuit traces on printed circuit boards can act as antennas, there’s noise coupling through magnetic induction, and I don’t know what all else. That’s why you have testing, shielding, and mitigation. One of my experiments ended up with a fair amount of copper tape to suppress EMI. That’s just one of many boxes you check in getting a spacecraft ready for flight. I’m betting the Russians forgot to check a few.