It's a matter of prrof. Here, as anywhere in the public domain, you have to be very careful of what you accuse individuals, or more importanly, large and litigious multi-national companies, because without proof that will stand up against a barrage of highly expert highly paid legal defences, you can find yourself on the wrong end of a libel action. I do not know of the cases of which you speak, although I am equally keen to avoid naming the company, but if there is evidence, I am sure it will be investigated. Beware of the hysteria generated when a certain Fried Chicken outlet abbreviated its name, purely to disavow patrons of the notion that fried chicken was the sum total of its menu. The Net grew a massive conspiracy theory that the company was legally prevented from using the term 'chicken' because it was growing millions mutated birds with no feathers or beaks or claws, which turned out to be utter nonsense! Sometimes a little knowledge is a dangerous thing.