Don’t look now, but your teenage daughter may be taking Shots. I’m not talking about Jack Daniel’s; I mean Shots, a mobile social network built entirely around selfies. The site is best known for the identity of one of its angel investors, a 20-year-old named Bieber. Regardless of what you think of Mr. Bieber, the selfie-centric social network his name is attached to is a solid project that can encourage network building and sharing among young people.