stolen Trek USA 520

My bike was locked to itself (frame to rear wheel) on my front porch. Really stupid in retrospect but my housemate, all our neighbors and I have used this method forever with no problem. I didn't notice it missing until this afternoon but I suspect it was taken sometime after 10pm and before 10am, as my housemate doesn't recall seeing it on our porch when he left for work late this morning. It is a 50 or 52 cm frame, 700c wheels, drop handlebars w/ disintegrating black handlebar tape.