It is harder to do now than it used to be, the old 3 pin warn plugs were very easy to short. 4 pin plugs not so easy. Also I don't know if this is just an urban legend anyway. I was a member of a number of 4wd forums when this first started circulating and I don't remember anyone actually providing pictures. Here is a thread from 2011 and no direct evidence but would love to see some if anyone has them.
https://www.patrol4x4.com/threads/wi...ehicles.60168/
Cheers Matt