You mention buying a new BBQ to your partner at dinner. Next morning, your Facebook feed is full of BBQ ads. You tell your mate you're thinking about a trip to Queenstown. Suddenly, accommodation deals are everywhere.
Almost every Kiwi has a story like this. And the conclusion is always the same: "Facebook must be listening through my phone."
But is it? And does the truth actually matter if the result is the same?
The Short Answer
Facebook has repeatedly denied using your phone's microphone to listen to conversations for advertising purposes. And technically, independent security researchers have not found evidence that Facebook activates your microphone in the background.
So how does Facebook know what you're talking about?
The Longer, More Uncomfortable Answer
Facebook doesn't need to listen to your conversations. It already knows enough about you to predict what you'll talk about before you say it.
Here's what Facebook actually tracks:
Your search history. Even when you don't search on Facebook itself, Facebook tracks your browsing across millions of websites that have Facebook Pixel installed. That furniture store you browsed last week? Facebook knows.
Your location. Facebook tracks where you go via GPS, Wi-Fi networks, and cell towers. If you spent 20 minutes at a BBQ showroom, Facebook knows, even if you never searched for BBQs online.
Your purchase history. Facebook partners with data brokers who track your credit card purchases. Bought charcoal at Mitre 10? Facebook might know that too.
Your social graph. If your partner searched for BBQs on their phone, and Facebook knows you live together (same Wi-Fi network, same location data, tagged in photos together), it can serve BBQ ads to you based on their search.
Your message content. Facebook Messenger messages are not end-to-end encrypted by default. Facebook can, and does, scan message content.
The result? Facebook builds such a comprehensive profile on you that it can predict your interests with unsettling accuracy. It doesn't need to listen. It already knows.
Why This Matters for Kiwis
New Zealand has a population of about 5.2 million. Facebook has data points on virtually every Kiwi who's ever used the platform. That data sits on servers in the United States, governed by US law, and accessed by algorithms designed to maximise advertising revenue.
The Privacy Commissioner has limited power to regulate what a US company does with data that's already left New Zealand. And once your data is in Facebook's system, there's no practical way to get it back.
What You Can Actually Do
You have three options:
Option 1: Limit Facebook's access. Turn off location services, remove the app (use the browser instead), limit ad personalisation in settings. This reduces tracking but doesn't stop it.
Option 2: Accept the tradeoff. Continue using Facebook knowing the cost is your personal data. Some people are fine with this.
Option 3: Use platforms that don't track you. NZ-built alternatives exist that offer social features, marketplace, and business tools without any data collection. These platforms are funded differently and have zero incentive to build advertising profiles on you.
The Real Question
Whether or not Facebook literally listens through your microphone is almost beside the point. The reality is that Facebook knows what you're going to buy before you buy it, where you're going before you get there, and what you care about before you tell anyone.
The question isn't whether Facebook is listening. It's whether you're comfortable with how much it already knows.
