Please note: Copyright notices are not required, they are only used out of habit, ignorance, or as a mild deterrent. http://www.copyright.gov/circs/circ03.pdf http://en.m.wikipedia.org/wiki/Copyright_notice http://www.copyrightservice.co.uk/copyright/p03_copyright_no...
I use them out of courtesy, to notice the person in front of the content that said content is (c) and that I actually did not forget to set a BSD/MIT/GPL/CC license, and/or to link to the actual license (which indeed leverages copyright).
Of course I know this is not needed from a legal PoV but I'm not using it for legal protection, I'm using it for actual humans to parse.
Also, the date metadata has been useful to me a few times. Please don't increment it automatically.