Hey PG, would you consider open sourcing your DMCA copy, kind of like Automattic's Privacy Policy and Terms of Service? I think there's definitely a need for an open source DMCA notice.
It's only a matter of time before you do get one. If you get a frivolous DMCA claim, will you make good on the bit where you say "Please note that you will be liable for damages (including costs and attorney’s fees) if you materially misrepresent that material is infringing your copyright(s)"?
That text is referring to section 512(f) of the DMCA, which states that any person that knowingly misrepresents a claim of infringement is liable for any damages including costs and attorneys' fees of the alleged infringer.
Basically it's just restating what's already in the law.
It's less trouble to put a link at the bottom of nearly every page than to think about what pages to put it on.