Boundry-plane infraction very late in the game
 

High school rules question:Team A scores and trails by one point. Team B takes the ball out of bounds with 4 seconds to go in the game. Team A unintentionally reaches through the inbounds side of the throw-in plane. There were no prior delay-of-game warnings during the game. Do you stop the clock and issue Team A a warning?

Ignore it.

Ignore it.

See the COMMENT in NFHS case book play 9.2.10.

And for those of you without books.....
 

jdw was correct.

COMMENT - In situations with the clock running and five or less seconds left in the game, a throw-in plane violation or interfering with the ball following a goal should be ignored if its only purpose is to stop the clock. However, if the tactic in any way interferes with the thrower’s efforts to make a throw-in, a technical foul for delay shall be called even though no previous warning had been issued. In this situation, if the official stopped the clock and issued a team warning, it would allow the team to benefit from the tactic. (4- 47-1; 10-1-5c)

So the correct advice is: ignore it unless you can't. :)