It's not unusual for people to just add a light circuit to any cables they can find either. I've seen mood lighting connected directly to a cooker circuit!!!! via a lightswitch, no RCD, no fused spur, nothing! Just a 45 amp MCB ..
DIY work is generally scary, particuarly when done by idiots!
They should do basic electrical safety as part of school! E.g. what an RCD actually does and why we have fuses!