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One of our Walmarts has anti-theft wheels
(lemmy.world)
None of the others in town have these, thought it was unusual enough to share
Many grocery stores in my area have these wheel locks. If I recall from college, if you took the cart out of the parking lot by carrying it over the plant beds, the lock would not engage.
These most likely lock from a small electric loop around the lot triggering an internal magnet, so y'all found a gap in the loop.
Nice hacking.
You can just lift the wheel about a foot off of the ground when passing the loop that engages the lock. Much easier.