A friend, J, told me about this yesterday. She has not opened her YM for weeks and yet *she* managed to chat up another friend of hers a few days ago. Her friend told her that it was about finding 5 people who have IQs higher that 110. I advised her to change her password.
Awhile ago I also experienced this. A college acquaintance suddenly said Hi through YM. Not wanting to be rude, I responded, and the following conversation ensued:
I did not click the link the hacker sent me. Instead, I deleted and blocked this contact of mine. I could not warn him because I did not have any other means of contacting him, sorry. I also changed my password immediately.
You have been warned. :)