“The multitude of blogs is a great evil. There is no measure or limit to this fever for writing; everyone must be an author; some out of vanity to acquire celebrity and raise up a name; others for the sake of lucre and gain.”
Substitute the word “books” for “blogs” above, and yes, Luther did say this (according to this source, Table Talk, No. 911: i don’t have access to a copy to check). It’s amusing how these tendencies persist, despite changes in the medium.
(Quote from this Publisher’s Weekly response to an interesting but pessimistic New Yorker article on digitizing libraries: thanks to colleague Bill Nienhuis for pointing out the New Yorker article, which is well worth reading.)