Sure, there are many possible explanations. But The Juice is going with this one: Someone had a REALLY bad day in court at some point in his or her life. As reported by WISC TV (at channel3000.com):
Madison Mayor Paul Soglin said changes are needed to protect employees at the City-County Building after Madison municipal court workers arrived at work Wednesday morning to find one of the courtroom walls covered with excrement.
Kelly McConnell, a judicial support clerk, sent an email and photo to Soglin, Dane County Executive Joe Parisi, Madison Police Chief Mike Koval and many other public officials detailing her frustrations.
“So THIS was found in the courtroom this morning as we were trying to get ready for court!” McConnell wrote. “Someone has been in the courtroom, AGAIN, and defecated in the courtroom itself. When will SOMEONE do something about what is going on in this building???!!!”