I've just had an interesting conversation with Mark Jones over at Frontline (frontlinecom.co.uk), due to a Simon Carter (likely a fake name) spamming the hpHosts blog to advertise Frontline's website.
Mark confirmed they'd hired an Indian based SEO company to market for them, and when told about spamming, said he would advise them not to spam the hpHosts blog again, but would NOT tell them to stop spamming. Why you ask? Well Mark informed me that SEO IS spam, and "it works though doesn't it?".
As I told Mark, there's two kinds of SEO, whitehat and blackhat (just as there is with everything else). Blackhat involves spamming, scamming and just about everything else you can think of, to market a company and thus, make the spammers/scammers, some money, and of course, make money for those they're spamming for. Whitehat on the other hand, is completely the opposite, and involves modifying your site for better indexing by search engines, and link trades etc, with other like sites. There's alot more to it, but I'll save going into that and point you to the following, that provides information on both;
Mark also mentioned that spam is not against the law. Wrong again Mark. Spam IS against the law, and has been for quite some time;
Whilst I was writing this, I received the following from Mark. He's CC'd me a copy of the e-mail he's sent to the spammer responsible, in this case, "Dr. Anuj Gupta" at nexpider.com.
E-mail addresses obfuscated ("@" replaced with "AT")