[Kevin Sevcik]

This seems entirely similar to the rule for herding/holding ringers in 2007. In that case, robots were only allowed to herd/possess one ringer at a time. If an additional ringer inadvertently fell on the robot, the were allowed to dispose of the original ringer, but had to remove the additional afterwards before possessing another. Also, it was not allowed to intentionally place an additional ringer on a robot to penalize or restrict them, and such ringers were ignored.

I imagine the GDC will go with a similar ruling here. At worst, an empty cell that accidentally bounces onto an inaccessible place on your robot will mean you can't pursue any more empty cells. So I don't think sandbagging opponents with empty cells is going to be viable once this is brought to the GDC's attention.