I can't. If t'were so, then a bunch of AOL servers would cause fraud alerts all day long. This case is easily distinguished by the other things Google can see emanating from those IP addresses.
On the other hand, if a set of IP addresses emits clicks for just one very narrow set of ads, resulting in a very abnormal distribution, then that should trigger a fraud alert. As it apparently did, if the OP's new theory that a rogue student is at fault is correct.