Three things: 1) If you don't lock your bike up, it will be walked away. 2) Street justice question: If the thief had a gun and used it to defend himself from attack, would the "stand your ground" law have come into effect? What if the bike owner had attacked the guy, the guy fights back, and the owner pulls the gun? Is that street justice to "stand your ground"? 3) I lock my $200 (10 years ago) bike to anything. If you remove the convenience of stealing it, it tends to stay in place.