SPAM - not the eggs and chips variety

Well I've just received my first spammer - my Spiderman 3 post just got a comment about viagra. I shan't delete it. Future ones yes, but this one is historic and thus remains. I had followed the blogger guidelines and turned on Word Verification to get rid of those pesky wobots... but human spammers, with their high single digit IQ's, are just too clever for that! It is possible to moderate all future comments - but I don't want that strict a control over comments as you have to review each and every post before its accepted. Surely there must be a way of editing after its been posted?

On a terribly sad note, when I first started to read the comment I honestly thought someone found my blog funny. It was only the very last sentence which dashed my hopes and brought me crashing back down to Earth.