Incidents at Georgia Tech and also in LA this week suggest a pattern.
You're right about that and IMHO it needs to be reported widely at this point. Kids on these campuses need to be aware that they should report any suspicious activities, and not take their safety for granted.
(Also note the incident in which 3 devices were found in East Chicago, IN on I-94 in the trunk of a car. Those devices too (like at GA Tech were designed to go off when handled). Police were alerted to that car because someone saw an altercation between the driver and the woman in his car. She was the one who told police about the devices in the back. Not sure if it is related to all of this, but it's worth a mention due to the bottles found in the back of Hinrichs car.)