These are automated spammers. I try to remove these as quickly as possible and ban the offending user (by IP address, typically), but as I was out of town this weekend on family business, I didn't get to this one that quickly.
I'll leave this one as an FYI, since you replied with your own question about it. I changed all of the links of the original post, however, so these unscrupulous jerks don't get any business from here.