Professor Richard Buckland

And if this goes, continues on this trajectory, then this software now could be used once the trials run and everyone's happy with the trial, which achieved its no-blame.

It could then be used to monitor everyone everywhere in a way we've never had before.

Once you've got technology able to do something, then everyone sits around thinking of reasons and ways you can use it to do other things.

And this is scope creep.

And we see this over and over again with privacy.

So the example I'm really familiar with is in New South Wales,

we had a trial of cameras to detect people using mobile phones because a lot of road safety data, as I'm sure everyone knows, shows that mobile phone usage by the driver was involved in a frightening number of accidents that caused harm to lots of other people, innocent people, when the driver was using it.

So they put these cameras in locations and they're very high resolution that can detect if someone's using a mobile phone.

It was a success.

It identified lots of people using the phone as on the basis of that successful identification, those cameras have been rolled out and they're increasingly appearing around New South Wales.

But the scope creep happened when someone said, we've got this footage, what else can we use it for?

We can easily see if someone's wearing a seatbelt using this.

So now those cameras are used for seatbelt offences, not wearing a seatbelt.

Sure, it's still a good thing to do, I guess, but the difference is with a mobile phone, the argument in the trial was you can kill innocent people.

Other people suffer from you breaking this law.

If you're not wearing a seatbelt, you're probably the only one that's going to suffer from not wearing the seatbelt.

It won't go back to the public and it won't be tested again.

Now they've got that capability, it can be used for other things.

And this is, I guess, what's scary and why it's always good to check back after a short period of time what the thing's being used for.

And by someone independent, is this in line with our own intents and values?