Because they use the same intimidation tactics (the operator obviously didn't want to cop to this in the article, but the author mentions some instances) and bo

Because they use the same intimidation tactics (the operator obviously didn't want to cop to this in the article, but the author mentions some instances) and both companies would suffer if either persued legal action. The truck operators stand to gain a lot more turf by hiring thugs and former service members who will not be intimidated or will intimidate competition than with legal action. Also keep in mind this is a cash-only franchise business operating at non-fixed locations in NYC... cameras are not in the best interests of the truck operators.