Now IANAL but there is something about all of this that I do not get.
In Australia, all created works automatically receive copyright, this includes websites, books, everything. What is the difference between a website being saved locally and a book or song being downloaded and then being saved. Presumably the authorities dont have a problem with someone saving a local copy of a website but this is a copyright infringement as a complete copy of the work has been made without authorisation.
What about the link save target as... which pops up everytime someone right clicks in windows. By the same logic, this is the creation of a new copy and is a copyright violation, at least in Australia. Is not Microsoft willfully aiding copyright violations by letting people save copyrighted works on their own computer.
In Australia, if saving a copy of a book or movie is illegal, then saving a local copy of a webpage is just as illegal and I do not think it matters who owns the website. By publishing the website, they still have not given permission for you to make copies in the same way a book and movie publisher has not given you permission to make copies.