We learned long ago in Butch Cassidy and the Sundance Kid that there are no rules in a knife fight, but there are rules of conduct on the battlefield, and EA has now posted updated rules of conduct (thanks Ant and Planet Battlefield) for playing on ranked servers for their Battlefield series (though some of the rules in the terms of service are oddly inaccurately related in the post describing the update). The rules cover their privacy policy as well as social aspects of online play, banning things like offensive player names, clan tags, and hate-mongering activities, while also attempting to curtail cheating by banning the exploitation of bugs, and in what may be an overreach, banning talking about bugs (it could be worse, as that inaccurate description makes it sound like they are banning discussion of bugs that don't impact gameplay or even don't exist). Word is:

You will not exploit any bug in the Service or in any EA product to gain unfair advantage in the game and you will not communicate the existence of any such bug (either directly or through the public posting) to any other user of the Service.