Another point is If students cannot change itself. Schools should set both severe may be forbidden to speak with the school teacher in profanity should respect teachers. If they were in violation of the rules of conduct will be deducted points.
In summary, the problem of speaking profanity could be solved .But it would take a long time to convince students to change themself and set rules to control conduct will be able to reduce the problem to say profanity in school a little.