Seconding hatred for Disqus. I also find that it’s extremely slow to load, and causes page scrolling to lag severely when the browser is under heavy load (i.e. lots of tabs open.) It also has the problem of any third-party code inclusion, that it allows the third party to track you across sites; for this reason I keep it blocked with Ghostery which I use to block ads and tracking.
Seconding hatred for Disqus. I also find that it’s extremely slow to load, and causes page scrolling to lag severely when the browser is under heavy load (i.e. lots of tabs open.) It also has the problem of any third-party code inclusion, that it allows the third party to track you across sites; for this reason I keep it blocked with Ghostery which I use to block ads and tracking.