My understanding is that a BIP should cover any behaviors that interfere with a student's education, intentional or not.
The ideal is that positive behavioral strategies be used in the BIP as opposed to (negative) consequences. It's been a while since we've done a BIP on thank you, but I do seem to recall reading somewhere that the negative consequences should be the very last intervention, with *many* positive interventions before that. For each behavior.
Let me see if I can find some samples for you.