And there isn't much you can do about that. Instead, think of it like this...do we bribe people to fall in WoE? Not really, and I think similar things would occur with battlegrounds. Most people play to win, not to see themselves fall.
Let's not overanalyze it. Making it automated with certain times could be good so it isn't so easily abused with the same guild and their alt guild working together to score each other points since they couldn't just do it whenever.
Um um um, I got nothing else really, the 5-7 team idea would be excellent, and I'd love to face off against other teams, and plus I wouldn't mind some of those rewards from it myself *.*