Don't worry about what strangers think of you as most ignore you. Others will just ask simple questions or simply inform you that the hammer is cocked back on your sidearm. Not very common to run into troubles when ocing.
Also familiarize yourself with your local laws. I started to oc in my car and paying at the pump at gas stations. I later graduated to Waly world. In about 2 years of ocing I have really only had one problem with the law. Drew my sidearm once.
Thank you phone for the ninja corrections. :/