[ablation]

I would be careful about "guaranteeing 100% anonymity" too. I think that would very quickly not be the case should law enforcement get involved after your service is used to send threatening messages to someone it shouldn't.

[mumphster]

Ya pretty much don't ever use this app if you actually want to be anonymous. DM's are logged and I really doubt the author would not comply if the Feds came knocking.

[iisbum]

It would not even be up to the author, Twitter would have the data and could provide this to authorities.