How to delete a Playstation Network account?
The description of the service:
PlayStation Network (PSN) is a digital media entertainment service provided by Sony Interactive Entertainment. PlayStation Network's services are dedicated to an online marketplace (PlayStation Store), a premium subscription service for enhanced gaming and social features (PlayStation Plus), movie streaming, rentals and purchases (PlayStation Video), a cloud-based television programming service (PlayStation Vue), music streaming (PlayStation Music) and a cloud gaming service (PlayStation Now).
It is not possible to delete your PlayStation Network account. The best you can do is delete any personal information that you have stored on their website.