I suppose it's true that they aren't paid to babysit, but by allowing rude behavior to go unchastised for so long, teachers have only made their own jobs more irritating.

我想他们的确不是拿着工资当保姆的，但是若长期放任学生的粗鲁行为，老师们只会让自己的工作陷人更大的困境。