Places like Wal-Mart make it easy for these people, especially if it's "still shrink-wrapped".
I worked at Home Depot a long time ago. One day, someone had returned a weed-wacker, in the original box.
They checked it out when they were putting it back on the shelf and found a broomstick with a bottle on the end. Right weight and weight distribution.
Stupid, low paid people at the returns counter really
make it easy.
I also remember getting literally the same 2 or 3 expensive electrical testers back a few times a month. Drug addicts kept stealing them & them returning them for a full refund, obviously without a receipt. The management figured it was easier to just give them the money than, I don't know, having them arrested.