LONDON (Reuters) - More than half of teachers in a survey said they thought plagiarism from the Internet is a problem. Some students who steal essays wholesale from the Web, they said, are so lazy they don't even bother to take the adverts off the cut-and-pasted text. Fifty-eight percent of the teachers interviewed in the Association of Teachers and Lecturers (ATL) questionnaire had come across plagiarism among their sixth-form pupils...