Outlets NOT For Computer Use
Was working for the U.S. Coast Guard as a Sys Admin on a now closed facility near NYC; the building I operated from was a horse stable dating from the 1800s that had been converted to office space. We found out many of the outlets weren't wired correctly when a LCDR would move his office around, unplug his computer and plug it back in sending a power surge up the RS422 "daisy chain" to fry other computers.
We had our electricians label any outlets that had no ground, reverse polarity, etc. as "Not for computer use" since they couldn't easily remedy these in a landmark building. Unfortunately, that didn't stop the LCDR from doing this at least twice more.