wildbest - 6:56 am on Nov 29, 2010 (gmt 0)

If Facebook were to, say, announce they only intend to use the word Face for anything related to social networking only, will that be enough?

As already said, the Web itself is a social network! This is why what you say sounds to me like "they only intend to use the word Face for anything related to the Web"... A generic word is now excluded from all existing and future Web-related products and services. This is simply not acceptable!