Not it isn't, the check is built into the upload client, they'd have to implement an on-device storage scanning mechanism. That's a different type of system implemented in a different kind of service.
Not that doing that is hard at all, it's not rocket science and they already have full-system indexing and search, but that's also why this isn't a significant step down any kind of technical slippery slope. The problem here is legislative, not technical.
Not it isn't, the check is built into the upload client, they'd have to implement an on-device storage scanning mechanism. That's a different type of system implemented in a different kind of service.
Not that doing that is hard at all, it's not rocket science and they already have full-system indexing and search, but that's also why this isn't a significant step down any kind of technical slippery slope. The problem here is legislative, not technical.