@bluemukaki: So should the French define how words borrowed from French should be used, because they introduced the words in the first place?
The Lego company can try to dictate how the word should be used, but English speakers will use the word however they prefer to use it, like they use every other English word. To say that certain organizations have a right to tell the speakers of a language how to use their own language – that way madness lies.
Here are other English words that came from company names or personal names. Should these companies or people tell us how to use these words?
darwinian, jungian, atlas, august, blimp, cyrillic, bowdlerize, boycott.