The same day her sentence was reduced Immigration New Zealand [INZ] served Xiao a deportation order.
Mr Middleton said a legal loophole had allowed the woman to be deported as soon as she started serving her home detention sentence.
"It's just wrong. They should have to serve out their full sentence before they are deported.
"It's as if she has been handed a get-out-of-jail-free card."
He said friends from the New Zealand biker community turned up to the Auckland International Airport to register their disgust as the woman left the country under police guard.
It's just wrong. They should have to serve out their full sentence before they are deported.
Mr Middleton said five turned up to the small protest which forced police to keep the woman inside the van until they moved.
Mr Middleton said it was a "fantastic" show of support by the biker community.
"It was really, really much appreciated because I couldn't get there."
A man, 46, who was part of the protest group was arrested by police and charged with obstruction. He was taken to the airport police station and subsequently given a warning for disorder and obstruction.