When there are no consequences, bad behavior is not corrected. This holds for everyone, not only children. AP's who continually abuse teachers without cause, will never stop unless there are repercussions for their actions, and not just a little slap on the wrist.
A colleague of mine suggested that the administration secretly likes AP's who act in this manner. It is the good cop/bad cop scenario. By not condemning this opprobrious conduct, they are encouraging it and using it as a way to rid the schools of certain teachers.
I want to believe this colleague is wrong, but I have my doubts. I need a sign.