There’s nothing in the DMCA that says Facebook absolutely must confirm the identity of the party filing the complaint. However, the way Facebook handles some of its complaints—by putting the victim in touch with the complainant—means that its current system is broken. How so? Because anybody could file a complaint against any site for any reason, and do so with fake contact info.
Thanks to the DMCA – the *only* US law I know of that presumes guilt until proven otherwise – anyone anywhere can zap your Facebook page (and perhaps even profile?) for any reason. Great.
This is why we need to ensure that issues like net neutrality are kept as far *away* as possible from Congress, the FCC and the Senate.