Lockers are school property; students are merely allowed to use them as they do with sports equipment, library books, school computers, etc. Lockers can be taken back without notice, for example if they are vandalised or become smelly with rotting food. Students are or should be told that schools have the right to search their lockers - it is a part of being in a school community where you have to accept its rules and responsibilities.It is in the interests of all students that drugs and weapons are not in school. The best way to ensure that such contraband items are found and removed is for the school authorities periodically to search a random selection of student lockers. Even if there is a privacy issue, students yield that minor right in return for the wider benefit of safety.