This was ruled by Karthik earlier in the season. It is allowed to throw objects in that direction towards the pole even when the opponent is trying to climb as long as the intent is not to purposely disrupt your hang.
Also note that there is nothing special about the final 30 seconds with regard to hanging. You can hang at any time.
So a team can just say “We did not mean to knock you off the pole when we accidentally hit your bot and knocked your bot off the pole.”
We know you can hang anytime but we did not know if the last 30 sec protected you.
You can believe the referees will be watching carefully.