CLEAN: France's prickly deterrent to keep people off railway tracks

The video tutorial covers consulting with Dujean, the use of visitor lockers, and the importance of understanding differences. It also discusses the proper use of headphones and how they should be controlled.

What is the significance of the statement 'Stupid. Headphones on. They don't control.' in the context of the text?

What does 'Put on properly' suggest about the actions or behaviors being discussed?