Tiered linking does not protect your website from negative SEO, although it may protect it from penalties. I built some web2.0s, articles links etc and pointed them at my website and saw some good results. I then blasted tier 2 with blog comments, article spinning and links from private blog networks. Within a day my website dropped by one page and then two. Link blasting through fiverr gigs just does not work anymore and only damages the strength of your backlinks. This might seem obvious to everyone but thought it was worth hilighting this with people, as many seo strategies involve blasting at the lower link tiers. Anyone out there have any views on this?