Not a college.
In response to an incident in a middle school (13 year old kids,) a school district in Idaho banned backpacks in the local schools. It affected middle schools (grade 7 and 8, kids 13 and 14 years old) and highschools (grades 9 through 12, kids 15 to 18 years old.)
From the article in The Independent:
Idaho’s Jefferson School District enacted ...