Deleting or blocking a friend without any notification. Whereas, you can blame it on "the facebook glitch" and begrudgingly add them back.
This also works with tagging/deleting pictures among other uses.
Jayme: "Heyyy, why did you delete me on facebook?"
You: "Oh sorry man, must have been a facebook glitch." <quickly adds the frienemy back>
3👍 3👎