Most pupil information's kept on computer now, and in fact, an outside agency holds much of this at the school which my children attend. Parents can phone in with a special ID code, and get up-to-date info about all sorts of school activities, help, their child's progress, etc. I'm sure that a caretaker wouldn't have access to any of this, and unless he leers at the students, or acts improperly, then his manner and dress is irrelevant. The school must be happy with this person, otherwise he wouldn't be in the job, particularly after "past happenings".