I'm interested in hearing what a lawyer has to say about this.
Don't expect any lawyers to chime in... :)
But it will take a lawyer to submit. And a lawyer ACTING AS YOUR AGENT for example.com website can file that DMCA notice for you and take all the heat should the respondent opt to publish (for the lawyer a golden advertisement) any contact info.
Unfortunately, lawyers cost money UP FRONT.
Google and the scrapers are pretty sure the effort of "little guys" is not there and will keep on truckin'.