The Police Association says they would be problematic.
Gang members submitted their concerns during a Select Committee on Tuesday.
Watch their submissions here.
Joseph Ahuriri was last seen at the Waitomo petrol station in Bay View, just north of Napier.
"We don't have to put up with this rubbish - it's disgusting."
A van with eight members of the visiting team inside was rammed and shot at while being pursued by up to four vehicles.
It comes ahead of the Government extending the law to all public places.
Steven Taiatini was hit and killed by a car in Ōpōtiki last year.
Two stolen vehicles and a stolen motorbike were also recovered.
"You do not know where that money comes from."
Officials say the strategy "may improve public confidence in the response to gangs" but comes with big risks.
Minister of Justice (Firearms) Nicole McKee says the measures are "needed to ensure public safety".
"He should look at himself," Willie Jackson says. "I mean, he's one of the reasons why things didn't go too well for us in the polls."
The former Police Minister said the Labour Government "could have been tougher on crime".
"They don't care, they're just laughing about it."
"Gang members aren't just going to hand over their patches."
"Most police officers will be supportive of the idea of getting tougher on gangs."
It comes after the Government announced it was cracking down on gangs with new legislation.
Social worker Eugene Ryder says it's the same old, same old that has been tried unsuccessfully since the 70s.
"The evidence shows it doesn't work."