This popped up on my radar recently, and now I got it twice in like two days.
My aim name is listed under my livejournal profile, cause I don't mind.
Friday I got an AIM message from someone with the following:
"your private friends-only posts have been stolen: [link removed]"
I immediately smelled a trap, and started digging, and quickly found that the site that this links to is a simple browser hack that makes it jump around and scream stuff at you.
So, just a friendly warning to anyone who mixes livejournal and AIM: watch out for this kind of thing.