Many researchers studies why vocational student always wrangle, some researchers gives suggestion about this problem, (WatcharapunPraditpong,2001) The cause of controversy assault of students found that students who cause mayhem controversy mainly over 15 years, the controversy is mainly due to the continuing conflict of antagonists and fellowship friend who had caused controversy before. Problems and difficulties in working to prevent and resolve the cause controversy. Barriers are important. Caused by hostile enemy the persons involved in the lack of cooperation, born of a desire to show the younger generation. (TurnjaiChali,1996) It effect fromJunior development system with a long history in the vocation part.
(SuprapunRuensamran, 1982) Due to the nature of adolescent prank. And was provoked by another adolescent and the release date has low resistance to provocation, so they have a sensitive to thinking and
maybe motivate them to do something in negative ways.