You have no idea just how many spammers we reject each day, in the last hour I have rejected 4. its an on going battle and they are getting better all the time. As we have 24 hour moderation we get most of them before you see them, an odd one is going to get onto a board, all I can say is don't get upset, just click the report button and then every moderator gets to know about it and one of us will remove it.
Graham.