I know it sounds weird, but it's simple, and get's a good laugh.
Basically, you point fingers. Here's how it goes:
^ Answers a question the above person posted. < Something random about yourself. (Possibly related to ^ statement.) v States something where the next person must respond to.
Here's an example:
^ That may be true. < Likes Chicken. v Likes Chicken too.
^ Yes, I do like chicken. < Loves Armor Games. v Loves Armor Games as well.
And that is pretty much it. The keys are Shift+6 for ^, Shift+, for <, and a v.