Reading through this fine batch of strikingly discouraging times people let the worst sides of themselves come out during relationships serves as a crash course manual in what NOT to do to the people you're romantically invested in. If these people were trying to take shortcuts to ending their relationships quick as possible, then mission accomplished.
Then again, love makes folks do some damn crazy, nonsensical things. Whatever you do though, don't break up with someone through text. That's gotta be one of the worst symptoms, or results rather, from dating someone in a technology-addicted world.