It is not a warning. The NCAA rule clearly defines it as a class B technical foul and it never mentions the requirement of a warning beforehand. However, the direct rule states that the referee can choose to ignore it if it doesn't interfere with the play of the game. I just can't understand why that would be called in that situation.
- After a team warning has been issued, attempting to gain an advantage by interfering with the ball after a goal or failing to immediately pass the ball to the nearest official after the whistle had been blown.