They were suspended for directly disobeying the schools directive after they had been warned what would happen.
They should not have been told no to begin with. The school is remaining silent on the reason why they were denied permission. Care to guess why?
The permission being denied IS the real problem here. Never should have been denied! Those officials got the lace panties in a wad when the students ignored their BS denial and they overreacted. Like so many school officials, they are pussies.