Pupil films classmate pulling down teacher's trousers - and posts it on the internet by LAURA CLARK - 4th April 2007 Posted on the Internet for all to see, this is an example of the growing epidemic of "cyber-bullying" of teachers by pupils. According to the caption on the popular website YouTube, the sequence shows a teacher having his trousers pulled down by a student at a school in Cumbernauld, near Glasgow. Bullying the teacher: A pupils pulls down his trousers and the episode is captured on a mobile phone On Tuesday, teachers called for action to halt the use of mobile phones and the Internet to spread embarrassing images of teachers. Increasing numbers are being humiliated by "obscene" photographs and video clips posted on websites such as YouTube. These include pictures of teachers' cleavages or taken up their skirts. There have also been cases involving images of teachers transposed on to pornographic pictures. Others are the victims of anonymous abuse on websites such as RateMyTeachers, provoking such extreme distress that some are considering quitting the profession. Damaging remarks have included "I have heard awful rumours about that man" and "he is evil personified". The Association of Teachers and Lecturers called on website operators to weed out offensive material or face legal action, threatening to sue for libel over the material. An ATL survey conducted jointly with the Teacher Support Network charity showed that 45 per cent of respondents had received e-mails designed to upset them. Twelve per cent said photos had been sent around which made them feel embarrassed or threatened. Delegates at the association's conference in Bournemouth also warned that some teachers were losing out on jobs because employers were using the websites to select candidates. A Department for Education and Skills spokesman said: "Teachers now have stronger legal powers to deal with cyber-pests as part of our continued fight against bullying. They can now confiscate mobile phones which are being used in a malicious or disruptive way. "We encourage them to make full use of this power if they suspect pupils are using technology against them." Delegates at the conference also demanded self-defence classes to save them from being sued if they were forced to restrain classroom yobs. Teachers were this week granted tougher powers to use physical force where necessary against students, but a snapshot poll at the ATL conference showed that fewer than half had ever had restraint training.