Azarenka's screaming is a plain embarrassment to the sport - nothing less. There is just no need at all for her to moan like that when she hits every shot.
If more of her and Sharapova's opponents started complaining out loud to the umpire over and over during matches something would be done about it really quickly. Either that of they should start shuffling their feet loudly before Vika/Maria make their shot and then say it was their normal preparation... split step or whatever.
Original Pro Staff 85, leaded to 370g, hybrid poly/syn gut set-up, 48-52-ish lbs.