Deliberate lane violations on free throw?

[billyu2]

M&M, I was hoping to get a response to the following similar situation:

Team A is down. They need to miss the free throw and get the rebound to have a chance to tie or win the game. Team B doesn't want that to happen so they repeatedly violate on the free throw. The officials decide they are going to ignore B's violations so A's strategy might play out. Except B2 and B3 still violate by entering the lane too soon. The officials ignore the violation, and the rebound is caught by B2 or B3. The game ends, Team A loses its chance to tie or win the game because the officials ignored the violation. How should the officials have handled this situation?