How are you determining whether or not the resource was requested? If you can hijack my network traffic you've already owned me pretty badly and don't need this

How are you determining whether or not the resource was requested? If you can hijack my network traffic you've already owned me pretty badly and don't need this silly game in the first place. If you haven't, this doesn't help you get that. Encrypted DNS is a thing, so snooping on those is non-trivial and not at all something you can be assumed to have access to.