The principal had it coming.
Again, this is not an offense that deserves an arrest.
Do they arrest and charge all the kids that cuss and swear at each other in the halls?
What about the kids who cuss a teacher out to his or her face?
What about arresting the principal and charging him as a sexual offender for his questions about her daughter?
Why are public school officials immune to the consequences of behavior that would land anyone else in jail, or have kids taken from their parents by social services?
Because those public school officials are in positions of power of course.