I've noticed a weird trend in my back links over the past month, I've randomly gotten about 300 new back links, but I'm not associated with them at all. A link to one of my webpages is showing up in all sorts of spammy blog pages. The content is definitely spun, usually about 200 words per post/page. On each page there is about 5-6 links to some spam site, but then they are randomly throwing in a link to my website. What's the benefit to people throwing in a link to my website among their complete spam shet? Does it make them look more "legit"? Can this possibly affect my SERPs? I'm a bit worried as I've worked rather hard to build a solid amount of legit links over the past year to this site and it now ranks very well. Am I correct to assume there is no real way to combat this shet?