Home Affairs Minister Karen Andrews has signalled she could deport two German brothers who were arrested over dangerous climate protests in Sydney.
Blockade Australia protesters blocked Port Botany for two days in a row this week, sparking traffic chaos at an industrial hub.
On Wednesday, a 23-year-old man was arrested after emergency services abseiled to him when he was suspended from a pole.
The man’s brother was charged on Tuesday after allegedly attaching himself to a 10-metre pole nearby.
Ms Andrews is looking into a case for the protesters to be deported on character grounds.
“It’s an option to be considered for cancelling a visa,” she told 2GB on Thursday.
“No one supports their conduct, it's stupid and they can go home”.
NSW Acting Premier Paul Toole called for one of the men to be deported.
“I want him gone,” Mr Toole said in a statement.
“If he can’t abide by our laws, he can go back to Germany because he isn’t wanted here”.
The NSW government will beef up fines and jail sentences for protesters who cause traffic mayhem.
The city has been plagued for weeks with disruptions caused by protesters targeting the Port Botany transport hub and roads in North Sydney.
A spokesman for Mr Toole confirmed the government would extend an offence which only applies to the Sydney Harbour Bridge.
A maximum penalty of two years in jail and a $22,000 fine could be slapped on anyone who disrupts a bridge or tunnel across Greater Sydney.
Legislation will be brought before state xjmtzywparliament to extend these offences to roads, industrial and transport facilities.
Labor leader Chris Minns backed the decision to provide extra resources, patrols and advice on tougher penalties for repeat offenders.
On Thursday, another protester suspended himself from a nine metre pole above the container rail in Port Botany.
Two other protesters from Blockade Australia chained themselves to trucks parked across the Penhryn Rd entrance to the ports on Wednesday.
A 71-year-old and 57-year-old woman were arrested by police within 40 minutes and charged with three offences.
They included encouraging the carrying on of an operation for the commission of crime, not obeying police directions and wilfully preventing free passage of a person, vehicle or vessel.
Both women are due to appear in Waverley Local Court on April 20.