Well, my nickname in my first job out of grad school was Murphy (as in murphys law). I was essentially a dowsing rod for corner cases and it was very much not intentional and extremely distressing. You could say I have some experience.
I have always wondered if there is a way to detect this particular trait either using MRI or possibly smell. Once you are in a space you can usually identify them because everyone seems to slightly avoid their workspace out of fear of being infected.
Old relays (especially when switching large DC currents) are fantastic for this purpose. The arc will essentially give off a mini EMP across the whole spectrum and woe to you if your gear isn't shielded and grounded properly.