Friend balls

You get dressed in your own clothes and take six Friend Balls and go for a walk.You spot four girls you know from school. They walk close together, talking as they go along the street.

You decide to catch one of them but you have to wait until you can get one alone.So you stalk the girls, waiting for your chance.They make their way to the local park and walked leisurely through it. When Stephany suddenly pealed away from the other girls and headed for the toilets.

She walked around the other side of the building out of view of her friends. At that moment you tossed a ball and caught her.You put the ball in your pocket and waited,after a few minutes Anne Maree appeared looking for Stephany. You threw another ball, the red light drew her in and she was caught. Two down, now only Melissa and Tony were in the park awaiting the return of their friends.

Should you try to catch them as well or leave with the two you already have?