Okay, I did not see ALL of this with my own eyes, but several team members and a mentor of mine swear that they saw a spy throw a boulder into the high goal at Palmetto, and they counted the goal. Is this explicitly banned by the rules and manual? Thanks for the feedback.
If the human spy had done so, should have been a G33 foul per instance. Only way the drive team (including the spy) can enter boulders is through an embrasure or brattice.