I saw this called at the state tournament this year and twice in the regular season HS (both girls games.) On the collegiate level, I know an official had a discrete discussion with a coach and player about the practice and the advisability of discontinuing it.
I can't recall seeing it more than a few times in the past couple of years, but for some reason I am seeing more of it this spring. I have been handling by simply saying to the coach or player "Not for nothing but did you know if a player puts their hands in the face of an opponent for the sole purpose of blocking their vision is a "T"?" That has usually taken care of it. I think this is different than the leg tap play b/c there is no contact and I think you can get away with warning and avoid adding what some may think as crap into the game. Again, just my semi solid opinion!:D