you went to the most innocent areas in England mate, I was in Birmingham the other week and someone was walking around the BullRing (very big shopping centre) with a machete in his jacket with the handle hanging out, think he was pretty ill as he was talking to himself and a group of lads (roadmen i guess) trying to deliberately walk into people, trying to start a fight. You may think you're the most dangerous until one of these kids pull out a knife on you, some are idiots but will do it and not care about the police.