You're welcome to report them - I'm usually pretty quick to catch and destroy them before most users see them.  I was unavailable over the Labor Day holiday which is why there were three or four of them in the forum until this morning.

For those not in the know, these are posts that are not obviously spam - they're typically "me, too!" types of posts that often have some superficial relevance to the threads to which they're posted.  The giveaway is that a Google search will show the identical post on multiple forums, and that there's typically a link to some product or service in the post or the signature.