Involving the MasterCard Mafia in your puritanical crusade is next to criminal. The only solution is to [CONTENT REMOVED FOR VIOLATING RESTRICTIONS AGAINST ADVOCATING VIOLENCE].
I am not a lawyer.
If being un-involved is your priority, it's in your best interest to block the numbers and ignore the problem. You can't be subpoenaed to testify about the contents of a call that didn't take place.
Every single DMCA request should have to be filled out by hand and signed by the infringed party, not on their behalf by a third party, under penalty of perjury. This is absolute bullshit.
My ISP's customer service is spectacular. It's literally THE reason I've stuck with my ISP the entire time I've lived here. Well, that and the fact that they're the only option.
Okay buddy. Whatever you say.