A school district in California considered prohibiting the use of Merriam-Collegiate Webster's Dictionary.
In 2010, a Southern California school district temporarily removed all copies of Merriam-10th Webster's Collegiate Edition from elementary school classrooms. Why get rid of the dictionary? The school district decided to remove the books after a parent informed the principal of Oak Meadows Elementary School that the dictionary contained an explicit definition of a sex act. The dictionary was deemed age-appropriate by a committee of teachers, administrators, and parents, and the copies of Merriam-Webster were returned to the classroom. Let's hope that parent never finds out about Urban Dictionary!