Seems lots of folks will stop and ask "Do you know your hammer is back (is cocked)?"
The standard response has been to do a dramatic forarm wipe across the brow and exclaim "Thank goodness! For a moment I was afraid my handgun might have become unsafe." A much better conversation starter than a snarky "Why, yes it is, isn't it."
Only once did someone attempt to press the hammer down (to fix it?). The wearer of the 1911 came this close >< to creating a large dent in the guy's head, took a few gulps of air, and had a very pleasant conversation about not touching other people's guns - especially while they are wearing them. The guy attempting to fix things went away wiser and with an understanding that at least one OCer was not a knee-jerk reactionary killer looking for the first target to come along. The OCer, on the other hand, had aged several years in that moment - something they could not well afford to do.
stay safe.