Pepsi

In 1992, Pepsi's bottle cap sweepstakes in the Philippines accidentally printed the grand prize number on 800,000 caps. When Pepsi refused to pay the $32 billion total, riots broke out and at least five people died.

In 1996, Pepsi ran a joke advertisement offering a Harrier fighter jet for 7 million Pepsi Points. John Leonard exploited a catalog loophole to claim the jet for about $700,000, and when Pepsi refused, an actual lawsuit followed.