Who ever is flagging this artist must not like this form of art. It'd be hilarious to see what they would flag for a Pablo Picasso masterpiece.
Picasso drew really abstract pieces of art (see also Cubism). That here is absolutely not comparable with Picasso since this is a really, really rough sketch with multiple anatomy issues (if the artist would draw in the "Cubism" style then you notice that).
I guess they wanted to express something else: Picasso is not known for good anatomy :P. Yet, their pictures are good in their style category, off-topic or not.