I often test in public, and people will always look and ask. Every time it is a show for all to see. I understand that, and have to accept that fact.
People will ask:
"You have the sensor thing, I thought you did not have to test"
"Bet that hurts eh"
or even better
"What are ya?"
For the most part, it drives me nuts when someone asks me what my sugar is. Why does a stranger to my diabetes care need to know what my sugar value is? Am I acting crazy? Why are they suddenly concerned, and when I tell my sugar they walk away? Are they just trying to make small talk?
I don't mind if, for sake of an example, my sister would ask me. She is involved in my life and has invested interest, and concern. A person at my work whom I speak with once a week does not have invested concern in my heath, rather a general curiosity and does not realize I get asked that question every time I test my sugar :)
People are curious by nature....or feel awkward and need small talk, but I am a private person....and don't need to be lectured by strangers every time my sugar is outside of the desired 4-6mmol/L range......unless they are doctors :)