I believe spad said it best
"At which point does an entity get to decide that it owns a random word that forms *part* of its name? Just because they're the biggest? It would seem that they're not the first, so that argument doesn't stand up. Why -book and not face-, or will the face- lawsuits be coming shortly?"
Oh well lets just go ahead and throw this in the court system and let someone make a coin over it, I'm sure someone in there is needing a few extra dollars they are going to make from this.