The PICS. NOW fad is used when someone on GameFAQs is a girl, or talks about a girl they know. This is mostly because GameFAQs users naturally distrust anyone who claims to be a girl (since many GameFAQs users are male) and also tend to be wary of anyone claiming to have a girlfriend, due to the stereotype that gamers don't have girlfriends.
This fad also spawned people saying "PHOTOGRAPHIC EVIDENCE. POSTHASTE.", as well as sparking the sudden rush in the change of the spelling of the word "now" to "nao" in some cases.
User 1: I am a girl!!
User 2: PICS.NAO
User 1: So I was talking to my girlfriend, and she said she wants to go to the beach.
User 2: PICS.NOW