RF and not RF
In a different life I used to pollute the Chemistry labs a lot, which is where I found an innocent young undergrad hooking slender wires to an oscilloscope. The object was to measure the micro-resistance in a small liquid filled cell undergoing transformations of various kinds, but the trace on the screen was pure noise. Recognizing the threat posed by ubiquitous fluorescent lights, not to mention megawatt radio transmitters just across the border in Mexico, I helped with some judicious tinfoil wrapping of the wires (hat optional) and saved the day for this young man.
However, not all threats come at high frequency. Here at home we were having strange problems with that new-fangled digital TV coming in over your basic co-axial cable from the outside. One entire local channel would pixelate and drop off the map, along with all its sub-channels (which tend to get used for cheap and cheerful re-runs of classic shows). Internet was not wholly reliable either, and even our POTS line to the outside world had a mains hum on it. I suppose that last bit was the clue, because I suspected the outside mains power line that had been upgraded. Sure enough, both POTS cable and co-ax were pinned against the house by the new power line, which was carrying two-phase 120V and would have all the noise that you get these days thanks to electronics, dimmers etc. A little rearrangement, and all was well. Social distancing is necessary for intelligences of all kinds.