Celebrities like Kate McPherson have been known to end tweets with this statement. In some ways it's a full on acknowledgement of a personal idea or claim but a dismissal of anyone's negative response to the claim. In other words, I want you to know this information but I am not particularly concerned with your opinion regarding said information.

Used when making a rant as a sarcastic joke but not really wanting to type the whole thing out.

It's used when you say something important but that not many people consider or even think about.