Sadly, the days when teaching was one of the "gentler" jobs are gone. Parents today do not teach their children to respect their teachers. Also, some of the folks who have gone into teaching don't deserve the title of teacher and it is always those ones who make the news. I have had, in my career, students threaten to hit me, threaten to kill me, swear at me, run out of the room, throw temper tantrums. Have had parents swear at me, threaten to hit me and threaten to kill me. Fortunately the kids I have now are sweethearts and haven't done any of the above.