I do wonder how they keep track of those things, I see them all over the place -- in front of houses in neighborhoods, "hidden" in apartment complexes, locked t

I do wonder how they keep track of those things, I see them all over the place -- in front of houses in neighborhoods, "hidden" in apartment complexes, locked to random things, left in the middle of the sidewalk so you have to push it out of the way to go by (my favorite), left unlocked in front of the corner store so anyone can jump on and ride away, &etc. Rarely do I see anyone actually riding them though.