Montana Principal Gives Wedgie

According to articles on Yahoo and The Livingston Enterprise, a principal in Livingston, MT has returned to work after giving a student a 'wedgie' earlier this month.
The articles state that Eric Messereli got caught in the moment at a school soccer game, and was horsing around with the student when he pulled his soccer jersey over his head and then proceeded to tug on the elastic wasteband of the boys underwear.
This is a very interesting story. Obviously Messereli went too far in his rowdiness with this student, but how far is too far?

Full Stories:
Yahoo
Livingston Enterprise