Barrel of Fun
Abort, retry, fail
Whether people are expected by others to steal or not steal is immaterial compared to the fact most pupils in the class do not appear to be thieves. It is not flowery but reasonable to suggest (if this is the countless PE lesson where the watch was handed over) that most have learnt the lesson that stealing is not for them... at least not for £80 time pieces.
Yes, most have learned their lesson, but someone or two haven't. It's a dereliction of duty to brush it under the carpet. Two young adults have not learned their lesson (assuming it is not the helper or someone else). The value is immaterial.