When the crowd forms around the luggage carousel I always wonder why more luggage is not stolen at this point. It appears to me that it would be very easy to take a piece of luggage, particularly if it were a common size and color.
Even if the thief did not get anything from inside the suitcase, if the suitcase itself was expensive, they would successfully get a suitcase.
The only airport I have ever been in that checked to make sure you owned the luggage with which you were leaving the airport is Oakland, and I do not know if they still supervise luggage.
Since the carousels are always on the non-secure side of the airport it seems like anyone could just walk in and take luggage.
Are there some precautions of which I am unaware? My only solution is to be standing right next to the door from which luggage emerges, but I am slow and seldom get to the carousel in time to get that spot. Generally I am at least one row or people behind the carousel.