I know that unique articles are needed for the best SEO and things like Adsense but do you ever use other people's articles? For example I have just set up a site and the WordPress template comes with some articles to show you what the site would look like, but they are obviously plagiarized. I was going to write one article at a time and replace the copied content on my site, but I am unsure if having those articles on my site while I add my own will permanently damage my rank. One thing I could do is spin all of the articles, but this would make them low-quality. What do you guys think?