I still do this all the time. It's a hard habit to break, and it seems to spread from one knowledge center outwards. I've gotten so used to knowing the answers to tech problems for people that it ripples out to things I've only skimmed. I catch myself once in a while, but you really need someone smacking you every time you do it to break the habit.

My fiancé is the one who beat it out of me. It still happens sometimes, but being aware of it really helps.