Cost That and having to have a couple people man each scanning station along with the equipment would be just too much for most school districts to accommodate in their budgets. However, I fully believe that having a couple armed security guards on the premises wouldn't be anything that would break the bank, nor is it something today that would be fought over doing. Having them scan each student coming into the building is the gray area. That would take an extreme amount of time, as well would require even more security as well as scanning equipment to speed up the process. There is no easy answer here, because it's unfortunately a needed requirement, but the fact that money drives every decision makes it much more difficult. In the high school my youngest son graduated from, they had used iPads for many of the classes his entire high school years. It was a costly expense, more than regular book fees, which were all jail broken by the students and were rarely used for their intended purposes. The kids were smarter on getting around the safeguards than the staff was at implementing them. That said, it was a colossal waste of money to supply kids with their own personal youtube devices during class time.... They should scrap that and get back to books, and use the money on security measures rather than play things. The lids actually learned less (got dumber) because of the iPads.