Do you haunt the virtual halls of Facebook? Post your every thought? Or just poke your friends occasionally? The Skinny Scoop, a blog by a pair of Stanford business school grads, surveys moms on all sorts of funny little things, from “What does the Tooth Fairy pay at your house?” to in-law relations. Not sure how scientific anything is, but the Facebook mom stats are particularly entertaining. Moms may fret endlessly about their kids online exposure, but 91% post pics of their little darlings on Facebook. Also, 75% have un-friended someone, and 64% have been unfriended – and 67% think Facebooking a birth announcement, instead of sending out cards, is just fine. And 88% have looked up an old crush.  Have you?