Secret phone contact can encourage members to leave.
He says they were "really strange" and "dressed like 1950s traffic officers".
The deaths of former refugees Kay Dah Ukay and Muy Thu Pa left their nine kids orphaned.
Forecasters predicted near record-low temperatures for Saturday morning.
"The last few days of June and early July are going to be well and truly winter."
The Government said any economic benefit would not outweigh ecological damage.
The teacher was fired four weeks later.
There are no plans to lay charges, police say.
Activists claim anyone involved in an upcoming 1080 drop is "committing an act of terrorism".
The fault line is expected to rupture within our lifetime.
All eyes are on the religious West Coast sect following the death of Hopeful Christian.
The race is on for Hopeful Christian's replacement.
Her children were there when the incident happened.
It follows more than 800 certifications being rescinded last month.
Re-establishing ventilation has been declared a priority.
John Ready hasn't seen his wife or kids since Christmas Eve - he talks exclusively to Patrick Gower.