That's when kids start to do things without their parents, but don't have the means to engage in most activities. There are plenty of parks and public spaces in the UK, but there is only so much football one can do before getting bored. Most of them can't afford activities, and they are unable to partake in the British national sport (going to the pub). The only thing left is to roam around and be up to no good. In the end, staying indoors and exploring the digital world is the only way for them to experience the world on an equal footing.
It's a tough world for teens.