Those of you who bother to look at the spam you get sometimes, have already noticed how spammers are getting more clever. As text-based filters remove all the possible combinations of V1agr4 or C1ali5, they started to place the text in images. Apparently some anti-spam filters use OCR to detect such things, but now the spammers want to be a step ahead. Frist they introduced some noise into images, but that didn't seem to work, and today I just got my first 3D spam.
Damn spammers, I wish they all get their Internet access denied ... for life.