A Google search brings up the photo - which appears to be stock image.
Thompson's location is listed as McDonald's Otara.
The post has attracted comments from many people - those who understand that it is a joke and those who appear genuinely concerned about the situation.
"Serve your sentence and then it will come off or you could ask the police to kindly remove it,'' one person said.
Another suggested calling in the help of TV3 cameraman Billy Weepu - the brother of former All Black Piri - who famously cut through a monitoring bracelet with a pair of scissors on live television.
Another woman suggested: "Cut your leg off.''