Suggestion Alliance/Enemy Function

I'm not sure if this idea has been brought up, nor if it is going to happen, but i think it would be a good idea to set up an alliance/enemy system, so we can have acuall "Guild Wars". yeah we fight other guilds, but we dont acually war them. I dont really have an idea of how this would be possible, but personally would like it if the idea did come about.

Yes, this has been bought up somewhere in the Game Suggestions section... I haven't got the link, but why not look there?