With @mentions, you can link to a user's profile who is participating in the thread. It provides a good visual queue for directing your comment at a specific person.
How do I mention people?
Just type the @ symbol and then continue typing the name of the person you’d like to mention. As you type, Disqus will show a drop-down list of suggested users. The drop down is smart — it will update with increasingly accurate suggestions the further you type.
Who can I mention? Can I mention people not already in the conversation?
We currently support mentioning Disqus names already participating in the conversation. In the future we plan on supporting mentioning Disqus users not already in the conversation.