Thanks for the link. Some of us may not know what a teacher looks like, but for the DM's helpful picture ! (Do they still look like that?)
Not sure what any little nark is able to say about people not paying enough tax, but it's an unpleasant idea. We might try the US Internal Revenue Service method . They pay any adult, who informs on a tax evader, a percentage of the tax recovered. Not a good idea here? Then why is getting children to inform here, and for nothing, a good one?