Link spam (also called blog spam or comment spam) is a form of spamming or spamdexing that recently became publicized most often when targeting weblogs (or blogs), but also affects wikis (where it is often called wikispam), guestbooks, and online discussion boards. Any web application that displays hyperlinks submitted by visitors or the referring URLs of web visitors may be a target. This is from Wikipedia, the free encyclopedia.
What a PAIN! Just stop it with the SPAM! What makes you think I'd buy anything you were selling after you clog up my email, my blog, my life with your crap?