I joined because I know from other lifestyle choices that online forums are often an indispensible way to gain knowledge, and knowing nothing really of BDSM this was an obvious step to discovery. I felt the need for more information at this point in my life because dom/sub behaviour has arisen somewhat naturally in my relationship and I don't see it as a temporary status, so there's an attitude of "If you're gonna do it, do it right".

As for the "one day wonders", well this is just my personal $0.02 worth: I don't think for one moment that it's a negative comment on the friendliness of this site. I would suggest that since the advent of the digital revolution and the internet, there is a globally developing sense of curiosity which can be fed/satiated by a few well chosen mouse clicks. For those with a small appetite, one day may be sufficient; for those with a genuine thirst/hunger for something more spicy, there is a greater tendency to linger. Additionally, they may just be (potential) Trolls, I'm sure you have/have had these types here, they're fairly ubiquitous (IME)