Some NYC students not permitted to bring their phones or other gadgets to school shell out $1/day at "valet" trucks like the "Pure Loyalty Electronic Device Storage" vehicle and other similarly converted vans. From the AP:
Cellphones and other devices, such as iPods and iPads, are banned in all New York City public schools, but the rule is widely ignored except in the 88 buildings that have metal detectors. Administrators at schools without detectors tell students, “If we don’t see it, we don’t know about it...”
The trucks that collect the cellphones have their own safety issues — one was held up in the Bronx in June, and some 200 students lost their phones.