Comparing a small project like that with the vast cyberstalking industry we call advertising today isn't going to yield similar results if the conspiracy theory is true. I can make a full tracker that drains the battery like crazy but that doesn't mean the smartypants who know when women are pregnant weeks before they do themselves can't come up with a system that's more efficient with acceptable data granularity.

Worst case scenario you succeed, and you've built yourself the torment nexus. If you publish your results, you'll have to publish the torment nexus to prove you don't have anything up your sleeve, making the world slightly worse for everyone else now that there's an accessible torment nexus ready to go. If you don't publish your torment nexus, nobody will believe you. Hell, if you succeed, you might've actually invented the thing! At best, the result of your success is knowing for sure you _could_ be spied upon any time, anywhere.

There's probably a much easier method to know for sure: work for advertising companies and learn their secrets.