To be fair, I would have reported it as spam, too. Spam does not have to be a scam or something non-legit. Its simply bad net etiquette to register a user on a forum simply to post an ad about their forum. Now, if it had been a guitar-building related (i.e. related to our forum's purpose) site (not another forum, of course), then that would be different. But, otherwise, in my opinion, this IS spam, regardless of how legit it may be.