#3: Everyone Loves a Knock, Knock Joke
Twitter user @alyshahahh laid down the law via “knock, knock joke” in her direct messages. After starting the joke with the requisite “Knock, knock” and the “Who’s there?” response, she told this person they “can no longer.” “You can no longer who?” they asked. Following that message, @Alyshahahh blocked them.

“You can no longer send Direct Messages to this person” is scrawled at the bottom of the above image. Admittedly, it’s a clever way to block someone. Perhaps we can all take a page out of this person’s book. Setting clear, specific boundaries is incredibly important, so good on her for doing just that.