If you’re using Drupal for your blog, and you have the default “recent comments” block displaying, you may have discovered that it swiftly fills up with comments with the subject line of “Pingback.”
I found this annoying: I want to see real people comments, not computer comments.
Luckily, this is a pretty quick fix.
Assuming you’re using Views (and who isn’t?), a comments_recent view should be listed as disabled. Enable it and edit it.