So if this is being used to track attendance what is to stop someone from just carrying their friends id for the day through the EZ-pass at the entrance? If a

So if this is being used to track attendance what is to stop someone from just carrying their friends id for the day through the EZ-pass at the entrance? If a student lobs their id over the fence, then walks out of the campus is the system going to think they were at school all night? Seems very problematic to implement an EZ-pass style system.