Delta’s “Needle Sandwiches”: Terrorist Plot or Hoax?

Half a dozen needles have now been found in sandwiches on four separate Delta flights. However, ABC NEWS points out this coincidence:

… A needle was discovered by a teenage passenger aboard a Delta flight from Amsterdam to Atlanta. The teen would not surrender the needle to authorities, who noted he told them that he planned to use it as evidence in a lawsuit.

In a federal report on the incidents, it was noted that the teen was the son of a passenger aboard the flight to Minneapolis who also found a needle in his sandwich.

So is this just a coincidence, or a hoax intended to get money out of Delta airlines? If it’s the latter, it wouldn’t be the first time someone has tried this. What Do you think?