I'm sure there's all sorts of interesting statistical anomolies ... anomalies ... anamal .... weird number stuff. In addition to the one-time posters and the never-posted, you've got folks like me. We go into PM hibernation for a stretch of weeks or months, coming out of it long enough for a relative flurry of activity. Then we see our shadow and it's back into hibernation for another 3 months.

I guess it takes all sorts.