I firmly believe that as users we should comment on and flag these answers. If they are not improved in a relatively short amount of time (12-24 hours). They should be deleted.
These answers add no value to this site and some of them may actually violate copyright law.
This site is about user content, we of course need links and quotations here, but if you don't have anything to add to the quote then link it in a comment or add it to an existing answer that it supports. Don't just post a quote and not say anything, thats really not useful.