I can't believe this hasn't made it here yet, but...
So, two days ago nightway created a meme that, using Javascript and if you're logged in, posts a chain of "sausage links" with the users who clicked on the meme before you. The meme was first in Russian, with no translation, yet people still clicked on it.

Then the "this is very interesting" meme started going around, and yes, people still clicked on it, and if they were logged in LJ, a post appeared in their LJs. Then people started panicking about both memes being virus and stealing LJ passwords. It's a good thing the Cold War is over! ;)

But that's not all! Another person decides to play with the script a bit and comes up with the Tic Tac Toe game!. nightway doesn't like it, but cdk's reaction is less than mature.

Meanwhile in lj_dev, there's a debate on the morality of this meme. And, of course, the occasional death wish.

And yes, if you've clicked on any of the memes, it wouldn't hurt to change your password and scan your computer just in case. :)

ETA: Newsflash: The memes don't do anything to your passwords!