He's trying to prevent theft.
Police will clamp a device called the Denver Boot on your car if you have too many unpaid parking tickets, which forces you to pay up.
But one guy in Chicago was spotted locking a Denver Boot device to his own car. Is he using the boot as a decoy so he won't get more tickets? Nope, it's just an extra lock he puts on his car so nobody will steal it.
The city says there's nothing illegal about it.
- Chicago Driver Gives Himself The Boot To Guard Against Car Thieves, CBS Chicago>>
- Guy Figures If He Boots His Own Car, Thieves Won’t Be So Tempted To Steal It, The Consumerist>>