We have seen SPAM using ASCII ART in order to avoid being detected by antispam filters. Most of the times, they try to show different words (Viagra, etc.) using this technique, but this is the first time I have seen them showing a picture. It is not a very high quality one, but I’ve tried it with some different antispam filters and they have been fooled:
This spam is just an invitation of one sex night friend and it is in Japanese, we have taken it from one of the spamtraps we have in Panda Research.