Dry run, conditioning, probing defenses, etc.
These muslims are perfecting the art of using our own defenses against us.
For a muslim, treachery and deceit are a religious mandate that the faithful are required to employ against the infidel (ie.: US).
Now that he and his dad have raised a stink, teachers and students will be afraid to say anything the next time that he brings an improvised electronic device into the classroom.