Using Fans to Deflect Balls

[FRC1540]

Update #1 makes the point that:
"...The purpose of the trailer is to serve as an open collection site for MOON ROCKS, EMPTY CELLS, and SUPER CELLS. As such, an attempt to cover the open top of any trailer or remove scored balls would be considered a disruption of ARENA elements and not be allowed..."

We take this to mean that teams may not interfere through the use of fans with other teams attempting to score in a trailer. We assume this would be a disruption of a field element. Is this a correct assumption?

That being said, if a team were to use a fan as a method of propulsion, wouldn't that team need to be careful not to blow that (very strong) blast of air backwards over their trailer or other trailers of their alliance?

[GDC]

A fan-induced airstream used to deflect an incoming MOON ROCK away from the TRAILER is not prohibited by the rules. However, use of a fan to descore a GAME PIECE would not be permitted.