Really?

How encompassing is the rule? Broadcasters often have their own twitter feeds that they mention on air - the whole point being that they are popular and thus a greater chance of something useful or interesteing being tweeted. Its no good quoting a site that viewers or listeners by and large havn't heard of. So is it just the verb to "tweet" or the noun "facebooker" that are banned? Other sites are obviously not different and/or innovative enough to warrent such gloabal reknown as facebook and twitter; the playing field isn't level so why should they all be treated equally?