[IronicDeadBird]

Originally Posted by Josh Goodman

Mmmm... maybe. The verbage is a bit odd. At first glance I would consider isolating boulders IN your opponents secret passage without contacting it's carpet running interference to prevent bots from entering. I hope that's not the case.

I think the GDC wants getting a boulder from the secret passage the equivalent of stealing a base in baseball. At the same time however baseball would be a very different sport if the main way of winning was just which team was the best at stealing bases.
A theory I have is the GDC is saying "Don't make a closed loop out of the scoring system"
Which is to say have a setup where you get the 6 cap of balls and then camp the passage as your supply line so every time you score you force the opposing side to introduce a ball into play (directly into your control) which you then score and use to repeat the process. The launching clarification means that you can't sit in the secret passage and "launch" a ball into the low goal. The only way to stop that would be to dedicate a robot to blocking the low goal which would leave all the other openings clear. This is just a theory though they could have patched this out by saying "you cannot score from your opponents secret passage."