Common Sense

[Nevadaref]

Originally Posted by OKREF

This is my thought as well.

Sometimes there is discretion in calling a technical foul and sometimes there isn't. For unsporting technicals, actions which everyone in the gym can see need to be dealt with according to the rules.
Passing on the action described in the OP would be wrong. There is a clear rule which the player broke and he did it in front of everyone.
Btw even if time had expired, if he did this before the officials left, he still gets penalized, so don't use the excuse that he thought the game was over.