CITIZEN'S ARREST! A person who controls a wifi near the "combination hair salon and toy store on the increasingly stylish Fifth Avenue strip of Park Slope" called LuLu's has given his or her network a positively vulgar name. It is a name that threatens to sully the posh and sophisticated reputation of a shop that charges $26 to give your child a new lease on life via his or her tresses ($10 for just a bangs job). It is a name that is not good for kids.