OP: Interesting Idea or Scenario Witnessed
Comment 1: I agree or think that's cool
Comment 2: Haha, that's strange. Something like that happened to me too!
Comment 3: That's because you did that one thing to me, comment 2!
Comment 4: *Ignorant of 2 and 3* Here's what I think will happen if so or here's why that happened
Comment 5: Wow, comment 3, you totally betrayed me that one time, so that's why I did that!
Comment 6: It's not my fault I did that, 5! I thought you were gonna do this to me!
And thus the thread was taken over by feuds.