Over reacted? Gee, I wonder if the police ignored the calls from the concerned citizens who saw these things and then one of those "silly toys" actually turned out to be a bomb and blew up killing hundreds...would you be saying that the police should have investigated the calls coming in about them and be calling for investigations into why they did nothing?
The police did their job and they did it well. Thank GOD they take the threat of terrorism seriously even when it turns out to be an assanine publicity promotion dreamed up by some head-in-the-sand morons at TBS. Better safe than sorry.
The police had to act on them, and seeing the pictures of them taking down the devices it looks like once they were on scene, they got the idea.
However, they had to get all the devices, because it would be a clever thing to put up 38 devices, including a few in harder-to-find places with real explosives, hoping that once the police found a few and realised they were harmless they would let down their guard, and you could remote-detonate the real ones when you had enough police officers gawking over them.