Teachers know what kinds of things don't need to be said. If he was joking around, he shouldn't have done it. You don't say inapropriate jokes to children... no matter who the student is. I'm a teacher, and i don't say inappropriate things to my little cousin at school. Shoot... I don't even give him a full frontal hug at school.
If he was sending inappropriate text messages to a student, he should be fired.
If he was having a relationship with a student, he should be in jail.
I kinda doubt that an iPhone app was used. If everyone loves this band teacher as much as they say they do, they wouldn't have slandered his name like they did.
More information about formatting options