[bduddy]

Originally Posted by Taylor

Nope. The hoarded balls don't have to be on a balanced bridge.
Consider a robot, probably wide-body, facing its own bridge and tipping the bridge toward it while remaining on the playing floor. Its alliance can pretty much fill this "funnel" full of balls, and especially if the robot is in its own alley, the balls are untouchable without a flood of fouls.

When it comes time to balance, the robot simply backs away, and the other two alliance partners can balance unobstructed from the other side. The first bot can either traverse the bump or climb the coop bridge to the other side.

Even if the opposing alliance get those balls, they'll have to score enough to counter the 40-pt triple balance.

I believe this would be considered controlling more than three basketballs at a time.

[G22]

Robots may only actively control three Basketballs at any time.
Violation: Foul per extra Basketball

[blue box]
Moving or positioning a Basketball to gain advantage is considered actively controlling. Examples are “carrying” (holding Basketballs in the Robot), “herding” (intentionally pushing or impelling Basketballs to a desired location or direction) and “trapping” (pressing one or more Basketballs against a Court element in an attempt to shield them).