I blame IM's and Facebook. o3o
I second that claim. xD
I have no idea.
Because we need more topics! We need shippings, fanart, fanfics!
I first read this topic and thought it was about something entirely different! /facepalm
It's all user based, really. We just need to come up with topics to discuss so that people can be attentive and attracted to the subject.
It's also dependent on how well you know the user.
edit: and most users are one hit wonders anyway. You know, arrive, join, raise hell and leave. That sort of thing.