As a Brit who grew up in London I know there are rough areas. However “no-go zone” is used to imply it’s an area that even the police won’t enter and in which anyone is completely at the mercy of criminals.

There are no areas like that in the U.K. outside a few hours during a riot or terrorist incident.

People who talk about “no-go zones” also don’t discriminate between fear and danger. It’s very easy to scare people who feel uncomfortable around people who don’t look like them or sound like them. That’s got nothing to do with how dangerous a situation is.

The photo you posted looks like a group of teenage boys trying to be intimidating. They are scared. Most young people who that kind of front are the same.

All the real hard men I have met have no issue with showing their face. They also tend to do everything they can to hide their threat but then snap with little notice. They don’t walk around in “I am scary” costumes posing and trying to look tough.