"Last week the New Zealand farmers were betrayed by their Parliament ... no one's arguing we need to do what we can do to keep M. bovis under control, but to bring the 2012 Search and Surveillance Act and put that into the NAIT act - which basically was designed to combat terrorism - has got to be a step too far."
Thompson is also concerned that the press releases from DairyNZ and Beef + Lamb New Zealand will lead people to believe that all farmers are supportive of the Bill when he says they're not.
"They don't support it, it's appalling behaviour."
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Don Nicolson is also scathing of the NAIT Amendment Bill, saying "protection of the property rights, protection of the private space ... are vital and this country is eroding those private rights daily."
Warrantless searches mean that MPI could walk on to any farm without notice, but Minister for Agriculture Damien O'Connor has recently said it will still need justification before doing so and the legislation was introduced to stop farmers having time to destroy evidence before MPI could access their property.
Mackay asks if stopping the spread of Mycoplasma bovis is more important than the privacy rights of farmers.
"Border protection is the number one issue in my thinking Jamie," says Nicolson, "that's where our surveillance should really be higher."
Thompson says most farmers support MPI's actions to eradicate M. bovis but this is a step too far.
"I'm still yet to be convinced that they needed to go to the step here in biosecurity and create such a situation where civil liberties are eroded to this level ... I have not seen yet any justification from Damien [O'Connor] or from MPI as to why they felt it necessary."