Defenders Hand blocking opponent's vision

[hoopguy]

APG, I am reading the rule and the case book and the thread and all seem to point to what Shane Battier is doing as an unsporting technical foul, by NFHS rule. He is placing his hand in front of his opponent’s eyes for the sole purpose of blocking/hindering his vision. In the post you link to, most seem to agree that this is not called mainly because a warning would be issued and the player changes his behavior. Would anyone make this call without a warning or with a warning in a High School Varsity game?