What little understanding I have of US copyright law is that the DMCA is merely a convenience to content hosters - you can optionally get a chance to right the wrong to potentially avoid a lawsuit.
Notice all the weasel words in there? Yeah... They don't have to file a DMCA to sue you, nobody does, they can just sue you. (Mandatory IANAL)
Notice all the weasel words in there? Yeah... They don't have to file a DMCA to sue you, nobody does, they can just sue you. (Mandatory IANAL)