When I was in high school we were required to wear our id badges on lanyards around our necks. The lanyard was small plastic tubing with a break in it "for safety". My sister and I were not particularly interested in wearing it, and began just clipping the badges to our shirts. Still clearly visible, just not on the lanyard.
Instantly, a shit storm erupted. Detentions and a suspension for insubordination and for failure to follow school policy (and for destruction of school property when we told them we'd thrown the plastic lanyard away).
Our father went to see the principal; he was told that the lanyards had "a safety release" to prevent choking and that we should feel safe. My father offered to demonstrate how holding on to the lanyard's "safety release" would allow someone to successfully choke a person wearing the lanyard. The principal declined (sadly), and back pedalled on his original stance. If we wore the badges "visibly" and carried our "excuse notes" for the lanyard, we would be excluded from the policy.
Ironically, within two weeks, a student was strangled during a fight with another student using the plastic lanyard from their id badge.