Crossword puzzle clue "an angry parent may not like yours"

An angry parent may not like yours

1930s anti-marijuana propaganda film that ends with the principal of a school saying, "The next tragedy may be that of your daughter...or your son...or yours or yours..." [points at the camera] "... o

Yours and yours only

You may not want to show yours

Bad way to be caught, when confronted by an angry parent, say

Something delivered by a professor or angry parent

Angry parent's decree, maybe

Angry parent's yell