Back in 1979 I had a 3 month old Gibson red ES355 taken from me. I left it at a local music store for a neck adjustment and while it was there, someone got my address off the repair tag. I think it was done with the help of someone who worked there or the store owner. The store is long gone.
I still miss it. I wish Gibson had a database like Alembic does for stolen guitars.
Moral; never give out your address on instruments going out for work to be done