He used Meta’s AI agent Muse for Marketplace sales. Then it set one up behind his back
1 Video View·Oct 21, 2026
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This isn't good.
Matt Robb started using Meta's new AI agent Muse
to handle his Facebook Marketplace transactions.
But after listing a keyboard for sale,
he got a bit more than what he bargained for.
Muse doesn't check with me.
It doesn't tell me this guy's messaged.
And then it gives the guy my address, agrees his price,
and literally tells him to come right now.
That's the crazy thing.
All this while Robb says he had no clue.
Rob, who reviews technology for a living, says he expected
the AI to make mistakes at first, but not to this extent.
Not someone show up at my address.
Muse is an AI agent run by Meta,
Facebook and Instagram's parent company.
It promises to stay on top of your emails,
buy your kids' school supplies, and even rebook an upcoming flight,
all in exchange for access to your most sensitive data.
But behind the cuddly face, experts say there is danger.
They're in it for your data. No, your data is not secure.
Not only your data, but the data of those who communicate with you.
Perron advises you to really look at what you're giving Muse access to.
So you have to put it to the worst case scenario.
If it takes this decision
and it's absolutely taking the wrong decision, what's the impact?
Meta says the data and credentials Muse collects are securely stored.
Muse runs on its own dedicated computer in the cloud.
Adding Muse will always ask for permission.
For sensitive actions like purchases or sending an email,
Muse checks with you first.
But Meta has a history of mishandling its users' personal data
and has even faced fines totaling hundreds
of millions of euro in Europe.
Now, Quebecers' data is protected by Law 25,
which experts say is Canada's strictest data privacy legislation.
Here, companies can face multi-million dollar fines
if they fail to protect your personal information.
But because Meta is an American-based company,
it is subject to the United States Cloud Act.
The U.S. government would have access to information
that is being stored on devices or clouds
or any kind of support that is being controlled by American interests.
As for Rob, he says he found out he had given Muse
a blanket permission to control his marketplace.
But that Muse came clean,
admitting it gave out his address without his explicit consent.
He is now warning others not to share too much personal information
to avoid a situation like his.
It could happen to someone more vulnerable.

