What should parents do if they send harassing text messages to teachers?

Teachers should face it rationally, don't be too entangled and don't lose confidence too much. They should believe that the facts have their own judgment, and deal with them coldly first, and don't care too much. For some cruel and unreasonable parents, if they take this matter more seriously, they will become more and more "unreasonable." Teachers should also adopt certain strategies to keep all the voice and written evidence of parents' personal attacks on teachers, and if this matter is finally necessary, they can take legal channels.