A few nights ago, a couple of hours after lights-out time, I had to reassure my traumatised children that they weren't about to be abducted by a pervert or dismembered in an industrial accident.
The ideas had been planted that afternoon. We'd watched two short films together produced by the government's now-defunct Central Office of Information: Never Go With Strangers and Building Sites Bite. Both were originally screened in British classrooms in the 1970s, and I was keen to see if they still had the power to shock and instruct today's YouTube-addled youth.
