Exactly. Bored people go to Facebook.com. Bored? Type Facebook.com. That's what people do. And considering the influx of "content" pages, like George Takei's, which provide continuous content updates all day long, I can see why people check back frequently when they're bored.

Subscribe to 5-10 "content" feeds and your wall will always have another joke or post to read...

Many people do this, I imagine.