It is the first time ever i did such thing.... With all the negative SEO threads i've been reading lately, i snapped ! While Spyglassing competitors for a customer which is stuck on the bottom of the first page on a tough keywords for 2 weeks, i noticed that somebody which was above had many expired domains as backlinks. And it was his main backlinks, probably some domains with PR divided into subdomains. He probably bought them all at once a year ago and they are now parked. I intended to steal his backlinks but there were nothing to steal so i pinged those expired domains. And i'm feeling happy about it ! Am i sick ? No matter what, i'm really looking forward his drop in the abysses of Google mouhaha ! Purpose of this thread, share a tiny trick for you guys, if you ever meet this situation and you are eager to earn some time .