"Nothing hot about this," said Rowanplatt.
Jatassy wrote: "Pretty poor role model. Gross."
"Hanging around warnie too much," said Mitch-a-palooza.
"Not your best look," kav53 said.
"Why ??? F***ing stupid..." jasonhardie added.
However others liked the photo.
"Who cares, still hot," aliciabalazs said, adding a kiss symbol.
Scott has graced the covers of men's magazines and is also a DJ.
She is Warne's first girlfriend after it was confirmed earlier this year he had split with fiancee Elizabeth Hurley.
The new couple have recently holidayed in Las Vegas with Warne's children Summer, Jackson and Brooke.
* See the full photo here.
- AAP