alt Hacker NewsIf you have access to an exploit and want to compromise someone with an image, you'd usually just send it to them directly via e-mail or SMS or AirDrop or whatever, or all of the above. And it'll even work if your image is linked in an email via HTTPS.
Trying to MITM an existing tracker pixel when they're connected to public WiFi sounds like practically the hardest way to do it.
The harder it is to do, the more the targets guard will be down
In this case, sending your malicious image through a fake email might get flagged, or even not opened by someone whos been trained in infosec enough to be suspicious of these things. But a tracking pixel in an email that is verifiably from a trusted entity will be opened no problem. Type of thing that will look pretty slick if you read about it being used