Copied from karohemd
Warning: The sausage meme and its evil twins
A warning, simply do not fill in the sausage meme (started by nightway) and don't click on any posts with the subject "Interesting" and then a "this is interesting" body with a link.
Currently, these are harmless but apparently they can be abused maliciously, so be careful.
There's lots of technobabbla on a lj_dev post here.