> To the extent that Twitter does not, it should be a simple process. You have cookies associated with an account; you have the email for the subscriber information; perhaps you have the phone number; you definitely have the IP addresses. Control F that through your system to see what other accounts have come from those IP addresses, are linked to that email address, are linked to the phone number, are linked to the same cookies. I don't profess to be a technological wizard, but it does not seem to be a complex issue.
Reminds me of freelancing nightmares where the client would being with: "This should only take a few hours but I need a website with a simple store front and shopping cart...". The best response I came up with to these clients was: if you know exactly how long it will take then you must know exactly the steps involved and how long each takes so you can do the work yourself and you don't need me :P