Earlier quoted context omitted.
That they showed by sexually exploiting children in the filming. There is no excusing this - forget about the 'message' - one is watching children in sexually explicit situations and trying to say 'the artistic direction excuses it.' I think I'm going to sit far far far on the other side of the overton window.
This is a pretty standard film criticism- you can't make a movie about something bad without glorifying it. Scorcese comes in for that a lot, Fight Club, people reading or watching Liar's Poker and feeling inspired, the list goes on.
Cuties exploits children on camera in an attempt to tell a story about child exploitation.