Some of these tracking websites (not UPS) require fairly simple data to reveal the sender & recipient.
I'm sure with enough time & patience you could enumerate the hell out of them or use data from previous leaks to get your hands on the good stuff. It's all about rate limiting, but that can also be defeated pretty easily.
I'm sure with enough time & patience you could enumerate the hell out of them or use data from previous leaks to get your hands on the good stuff. It's all about rate limiting, but that can also be defeated pretty easily.