There could be a little box somewhere on the side with a list of users. Example:
Now, notice (Abnormal!1) is there. Let's take Rio as an example (As always). After answering a question, she feels like chatting. She sees my name "Ooh!", she sees JCM "OOH!", but then she sees Abnormal, "...nvm." She will see it's better if she doesn't go because someone she doesn't like is there.
This will be a great addition beause it will greatly cut down on the drama here.