We had 4 checked-in pieces of luggage to HKG. Three came out while we waited at least 10 more mins for the last suitcase to arrive. When I was ready to unpack my suitcase, I noticed the lock/zipper opening was all the way on the bottom - not at the top where I had it, but didn't think much of it. Until I opened up the suitcase and could not find my extra cell phone. Someone working at baggage had presumably gotten into my suitcase and took the only valuable item that was in there.
So beware! Anyone can open up your zippered suitcase, and close it back up without it looking like it had been opened.