End of game delay warning

[CoachJW]

High school game, everybody is out of timeouts. There have been no delay-of-game warnings issued. Team A is down by 4 with 5 seconds left in the 4th quarter. They have a baseline OB. They inbound and A1 makes a 3-pointer. Now Team A is down by 1 point, but the clock is at about 3 seconds when the ball goes through.

(A) as soon as it goes through the net, A2 grabs it and tosses it toward the bleachers.

Or...

(B) B1 grabs the ball and steps out of bounds. A4 is standing about 15 feet away from B1 and uses his arms to break the plane of the baseline.

Basically, Team A is desparately trying to get called for a delay of game. It's their only chance to stop the clock and make Team B inbound the ball one more time.

The NFHS case book (9.2.10) has a comment that officials are supposed to ignore this action. I presented this to a veteran official in our area, and he was surprised it was in there. He said he would probably still whistle and call the delay.

How many of you would ignore this tactic, as instructed in the case book? Would you treat (A) and (B) differently?

Thanks for your help, as a young varsity coach I appreciate the sharing of knowledge and experience on this board.