Man, its too bad that Riot derives so little profit from League. If they just had an extra $100 on hand, they could have bought some plywood to build booths for the teams to play in and prevent any possibility of players seeing info that they shouldn't.
Strange, too, that the venue didn't have any kind of screen or curtain that Riot could have rented to fulfill the same purpose. Because, you know, that's usually an option.
Then again, in a much more likely scenario, maybe Riot just sucks out loud at planning.