Did anyone build an "active" goalie post?

[pandamonium]

On newton one of the goalie bots blocked the top of the low goal and I saw a ball resting between the robot and part of the low goal with out going in for about 30 seconds. No foul was called for possession because the opposing robot cant cause them to possess the ball. Just like you cant just spit into an opponents catcher. By the same logic the opposing robot is putting the ball into your mechanism so even if it is posetion it is not a foul...