Why isn't uniform rule being enforced at the end of game?

[Adam]

Originally Posted by Old School

If the kids are pumping there shirt chest out, in the face of the opponent after winning the game. You don't think this is unsportsmanlike? If they where to do it in the game, it would be a T but after the game, it's okay.

This could be taunting, but I'd have to be there.
There's precedent for this, in that there are lots of things that are T's during the game but aren't once it's over.