http://www.tennis.com/pro-game/2017/05/kuznetsova-other-wta-players-are-tired-talking-about-sharapova/65984/
It is nothing but a distraction. Let Sharapova prove herself again on the court and at the same time prove that she isn't using banned substances by playing and submitting to testing like other pros. Beyond that the chatter should end.
One question I have about all of the testing is that it appears easy to mistakenly take supplements that might cause you to fail a drug test. It seems that there should be a way to confirm that some type of supplement is approved or not beforehand rather than face the risk of a ban.