I applaud your vigilance, but I don’t want anyone to become a casualty in their quest to be a “have a go hero”. Too often, you hear of good neighbours being beaten senseless by gangs of youths. With today’s knife crime, the best thing is to discretely report them. With any luck, they might get caught in the act. If you’ve already highlighted someone is on their case, they are more likely to disperse and vanish into the ether.