I am new to SEO, and I need some advice. I was thinking of buying social bookmarking links from some providers on seo clerks, and I just wanted to know whether it is a good idea to do so. There are loads of gigs offering to create loads of social bookmarking links, link pyramids and link wheels at really low prices, but I just wanted to make sure that it's worthwhile to buy these services. I don't want my site to get penalized by Google or get banned. What has your experience been? Have any of you ever paid for such services?