[justAnotherNET]

When I was younger a friends parent worked for an LEA that did this to spy on people suspected of social security disabilities fraud.

This was in the mid 1990’s, he showed me pictures of literally this exact thing high voltage sticker and all.

[crististm]

The high voltage sticker is ubiquitous. It's not representative of anything other than what it stands for: "high voltage". If anything else it might be a decoy to scare away ... maybe nobody that would matter.