They should visit a local animal shelter and get a couple of pit bulls for additional security....
I don’t know about OHIO, but most junkyards in the South have guard dogs, like Dobermans, German Shepherds and Pit bulls................
In the town where I lived when I was young there was a metal-working shop that was a frequent target for theft. That activity stopped when the owner posted a sign stating that when the shop closed they released a number of rattlesnakes into the shop. How many? the robbers had to guess ...