It is sometimes very difficult to spot the non-bot spammers. You could really help us out if you see a questionable post, or obvious spam, by reporting it using the little button that looks like a triangle with an exclamation point in it that shows under the post.
Luckily, most spammers just aren't smart enough to read that they have to post their first five posts in the New Members Forum, so they're pretty easy to spot.