Musical.ly has a privacy problem and now one school wants it banned

Poor parents. They only just figured out what in the world Snapchat is and along comes Musical.ly.
The app you've probably never heard of has been banned for those under 13 in an Australian school thanks to privacy issues. 
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The all-girls school Wenona in Sydney raised concerns about Musical.ly on campus amid fears primary school students were copying "highly sexualised dance moves" seen on the lip-synching app, Fairfax Me