The barbarians are at the gate*
Grey nomads celebrate Queensland border opening as they migrate north:
“It’s like the whales swimming up the east coast going to the warmer waters – we go to the warmer climate.”

While the breaching of humpback whales is a spectacular sight there is no record that a breaching of grey nomads is at all pleasant. There could also be some questions around externalities on the costs.
*What is the origin and meaning of the phrase “Barbarians at the gate”?