That block shot signal is not a college mechanic. I think it can be used sometimes (late after the play has ended) to communicate yes I was on this play and yes although it looked ugly there was a blocked shot.
Personally, I think there were other fouls called that were block shots called in the game. Also, too many bail out plays at the rim level called fouls. Finally, way to many "and 1's" on easy plays to the hoop.
Other than that, their credibility level is outstanding that is why nobody questions the types of plays I mentioned above.
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