nilcypher said:
Learn how to kick someone in the balls and then run away
I've taken a 2-week period of Jujutsu as part of my high school gym class, and during the practicing of techniques, a great deal of importance was placed on not getting kicked in the balls.
A kickboxing stance has the body turned slightly so that one foot is in front of you, and one foot is behind. This stance makes it difficult for someone to kick you in the balls. I don't know what kind of stances other martial arts use, but they most likely have some stance/technique for defending against such an obvious weak point.
So if some chav on the street has a cursory knowledge of martial arts/a cup, exploiting the weakness of Freddy and the twins might not be that easy.