Was this a dry run. If anyone intended it to be a real operation, there would not be so many.
Or maybe a decoy to sap away attention from something else. Well it may increase prices of sending stuff by air cargo via UPS, Fedex, DHL, and others, as security vigilance costs escalate.

http://www.rthk.org.hk/rthk/news/eng..._56_708962.htm