A woman fed up getting political mailers from Colorado Rep. Marilyn Musgrave [wiki] (that's her on the left) decided to do something about it, which landed her in court:
Invoking Thomas Jefferson and Mr. Hankey from the television series "South Park," the lawyer for an ex-professor accused of leaving dog feces at a congresswoman's office said her client's actions qualify as protected speech under the First Amendment.
Kathleen Ensz faces a misdemeanor charge of "use of a noxious substance." She is accused of taking dog feces from her backyard, wrapping it in a political mailer from Rep. Marilyn Musgrave, and leaving it at the Republican's office, according to court documents.
Link - via Scribal Terror