UK thugs pressure juveniles to serve as undercover informants on other criminals.

This can be dangerous for them, and not just the direct danger of violence.

The article says "children". If any of them are really children, that would be horrible, but that is unlikely. I expect they are teenagers.

When teenagers are eager to do this, perhaps because they want to get even with those that exploited them, and supposing they understand the risks, then I'm all for giving them the chance. But we have to suspect that most of them are coerced. Juveniles that are accustomed to being exploited for crime, or enslaved, would have trouble saying no when bullied by thugs.