Annoying Habit

I have this annoying habit of correcting people when they say me and somebody else, when instead they should be saying that person and I. For example if somebody says,
"Me and Susannah went to the ice cream store." I correct them and say, "You mean Susannah and I." It's awfully annoying. I know this because people use to do this to me all the time. It always really bugged me. It makes me such a hypocrite for constantly correcting people, but I am helping them improve their grammar. Anyways, i think the past people in my life who always corrected me should really be the ones to blame. They made start this awfully irritating habit.