Candy
M&Ms and Mars bars may be tasty, but that doesn't imply the firm that manufactures them is. When someone trespasses on their property, they take it seriously, as was the case with some candies sold on the black market in Canada.
Due to several laws and regulations, there are limitations on what can be sold and where in the case of candy. Because Kinder Eggs, for example, cannot be marketed officially in the US, there is a gray market for them there. The price is another problem. Because things are frequently less expensive in America than in Canada, one reseller was sued by Mars as a result.
Aizic Ebert was retailing Mars candy in Canada at less money than Canadian retailers were asking for it by purchasing it in the US. Ultimately, Mars Canada sued them and prevailed.