The other day there was a girl in the student resource building who was wearing a Pizza John shirt. I was so excited I flashed the Nerdfighter gang sign, but sadly, she didn't really respond. : /
Once in a books shop when I was buying paper towns I saw that the person in front of me in the Que had the book in there hands as well so we started talking, I wasn't sure whether he was a nerd fighter or not and didn't want to flat out ask in case I sounded crazy. But as he was leaving I told him to DFTBA and he turned around and just went "Don't worry I wont" apart from that the only other nerdfighter I know is the friend I introduced to the green brothers.