I too am a Bloomingtonian (kinda) and I have and do OC and CC from time to time and I find that the reaction you get is all about your own attitude.
Like Nate said a smile and a head nod, no problem. But I am willing to bet you go OC'ing around San Fransisco, Indiana with a chip on your shoulder, you might have a problem or at least a gayfrontation.
When I OC I have never had an issue around Bloomington or Bedford.
I think YOU should do whatever YOU are comfortable with!
Perfectly stated! And I got to learn a new word...gayfrontation