I do. But I work at the American Stock Exchange on Trinity street. I lock my bike up outside (across the street) and haven't had an issue in two or three years I've been doing it. I have a perhaps, misguided belief that all the cops and security buzzing around protects it. Probably just been lucky it hasn't been taken yet.
god, this city does a terrible job with supplying bike racks. i think i found a few spots that may be sort of safe to keep my bike, but it just seems like it's a throw of dice to whether it will be there when i get out again.... i've seen quite a few bikes stripped of all parts or broken and bent.