Yes, I’m guilty of this ALL THE TIME.
I suppose it comes with the territory of being an English teacher. It’s tiring, and it’s also a big pain because you stop to nitpick instead of going about your daily business.
Then again, it’s also fun (when not done during checking of papers).
I bring this up because thanks to UP Lingua Franca, I will soon have a shirt shouting to the world of my guilt.