Just a quick pointer to this fun post by Toma Tasovac, which discusses the removal of a term from WordNet, the best known and most widely used lexical database for English. Apparently DuPont, the huge chemical company, expressed displeasure about the entry for Teflon (oops, I mean TeflonTM), which did not indicate its status as a registered trademark.
Christiane Fellbaum's mail to the WN-USERS mailing list indicates that, although DuPont had not yet actually requested removing the term, the WordNet folks "settled" by offering to do so as "the simplest solution". Tasovac suggests to DuPont that they follow up this clear success by following his generously contributed outline for setting up a Division for Lexicography, Trademark Enforcement and World Domination. He concludes, "I have three more killer tips for how to rule the world by means of lexicographic black magic, but they are patented and trademarked. I am willing to discuss business propositions with DuPont representatives in strictest confidence."