The student did get his Linux disks back after the class. The lad was being disruptive, but that wasn't mentioned. Neither was the obvious fact that when she saw a gaggle of giggling 8th grade boys gathered around a laptop, the last thing she expected to see on that screen was a spinning cube.
She didn't know what was on those disks he was handing out. It could have been porn, viral .exe's...any number of things for all she knew. When she heard that an adult had given him some of the disks to hand out, her spidey-senses started tingling. Coupled with the fact that she truly was ignorant of honest-to-goodness Free Software, and you have some fairly impressive conclusion-jumping.