You are dead on about warning the refs. How all of this is interpeted is an amazing thing.
This would make a great new topic thread. All the great/terror there is to have a game so large and rules so thin. You gotta love the trust and gamesmanship in all of it.
Check out this scenerio...In the rules or even laws there is nothing concerning a defensive wall. There is the 10 yard rule, as well as rules concerning encroachment and taunting.
During a match I was once warned against setting a (jumping)wall against a free kick. Now I know this is a technique as old as the hills. I disagree with the official but if you read the book he can make an arguement.
Amazing stuff isn't it?