Our entire administration is ok with senior ditch day. I'm not sure exactly how much money we lose from it. Afaik, all public schools in California receive funding by attendance.
At least it's more creative than other FB cliches like the camera picture in your bathroom mirror. Not when every phone made in the last two years has an "Upload to Facebook" button somewhere. That seems like it could be a problem for people that take nude photos of themselves.
This is why you never leave your clothing unattended. At least you know how to wash your clothes. Most of the guys in my school still have their parents do it.