It is a mistake to publicly share details like this. It increases the chance of theft.
I'm sure he knows what he's doing. It's probably a peach tree that was hit by an airliner and it's on his aunt's land. Misdirection is the first line of protection.
It's so easy to safeguard private key(s) through misdirection; just hide them in a personal image from your dog or something, and store that one between your other personal photos. You could even upload that to a cloud or whatever other online service in a shielded environment, and still be very safe even if you got compromised; no hacker is interested in stealing personal pictures of your pet... Unless, the hacker would be really reaeaeaeally paranoid that is off course
