A friend of mine had his $5000 mower & trailer stolen, the police found a stolen truck with the trailer still attached with the ball clamp still locked down and no mower , there was a 1-7/8" ball under the 2" hitch.I just leave the ball clamp lock in place (as per law, you're supposed to have it locked down whilst towing so you should already have that little piece in your arsenal). They can't move it to get a ball under there so, they can't tow it away.