Is this against the rules??

[JRutledge]

This is what the NF says to do about a similar issue.

SITUATION 11: The score is tied 60-60 with four seconds remaining in the game. A1 has a fast break and is near the free-throw line on his/her way to an uncontested lay-up. B5, running down the court near the sideline, intentionally runs out of bounds in the hopes of getting a leaving-the-floor violation called. RULING: B5Â’s intentional violation should be ignored and A1Â’s activity should continue without interruption. COMMENT: Non-contact, away from the ball, illegal defensive violations (i.e. excessively swinging the elbows, leaving the floor for an unauthorized reason) specifically designed to stop the clock near the end of a period or take away a clear advantageous position by the offense should be temporarily ignored. The defensive team should not benefit from the tactic. If time is not a factor, the defense should be penalized with the violation or a technical foul for unsporting behavior. (9-3-2; 10-1-8)

Peace