My thanks to Jamie Smith, who found a couple more examples. Here's Jamie:
"Cursory browse reveals a couple entries from Mario Russo to the 2015 International Aylan Cartoon Illustration Exhibition: a Google Image search on one panel reveals it to have been ripped off from a Deviant Art portfolio by artist "asprin0" (note blatant signature + copyright removal)."
Link to entry:
Link to original creator portfolio:
"... Aaand the other one too:"
Mike Cstod Peterson talks about all this at his Comic Strip of the Day blog: Perseverance, Perserveration and Not-So-Great Expectations.