And I want to make it clear that I am not saying that anyone with multiple teams in the same world IS ACTUALLY cheating. I do not know if anyone is.
In fact, billyg and jdno (the only 2 people who I know have multiple teams) both do not cheat, IMHO. They are both outstanding coaches and I am not trying to accuse them, or anyone else of cheating.
I am merely saying that cheating/collusion is made to be a trivial effort event if multiple teams in the same world is allowed.
I would say, if there were only a couple of world's out there to play in, that it is a risk we need to take.
But unless someone has a team in every world, I do not see it as something that needs to be done now.
I currently have 1 team in every world with my one userid. I have no other id's. I have plenty of competition in every place I play, and there is plenty of fun without the need for me to have 2 teams in one world.