Is there any incentive or law that causes Github to accept digitally submitted DMCA orders through a web form at all? If it was possible for them to require ind

Is there any incentive or law that causes Github to accept digitally submitted DMCA orders through a web form at all? If it was possible for them to require individually signed (by an actual person with a pen, not a picture of a signature), individually snail-mailed requests, then that would at least make the process take O(n) time and O(n) money, making it a bit harder to abuse.