Disadvantages of using Disqus as your commenting system:<p>1. Your comments are in disqus, and not local to your server
 2. Users with JS disabled are not going to see the comments
 3. Friends and other would-be commenters may be banned by Disqus without having been banned by you.<p>As to point 1, I believe there&#x27;s an API that you can retrieve your messages from if you ever want to migrate away from Disqus, but the other two (I think) hold true no matter what.