What is it? Poor attribution.
I'm not talking about poorly cited (or nonexistent) sources, although seriously, please don't share posts with that nonsense in it. No, this is about taking a quote from a book (or movie, or whatever--I'm talking fiction here) and attributing that quote to the author who wrote it, rather than the character who said it.
I know, I know, it's an easily justified practice, and at times when you need a quote in a hurry but can't remember the character, the author may be close enough. Except that doing so is imprecise at best and misleading at worst.
Why? Because the author who wrote the good guy also wrote the villain. Because dialogue is for moving a story. Because it's fiction. And because without a definitive word from the author, pulling a random quote from her book and presenting it as her quote may not be reflective of what she really believes or thinks.
Here's my least favourite example (and it shows up on Twitter approximately 516876 times per day):
We have Google now. Please, please, please use it when you're quoting something and you can't remember who said it. And (gently) encourage others to follow suit. To kick us off, I made a small adjustment to the quote we started with:
|Want to make one? I use quozio.com.|