You were tired, a bit wound up, scrolling in the dark. Someone had posted something that annoyed you, and before you really thought about it, you typed a sharp, sarcastic comment and hit send. It felt satisfying for about four seconds. In the morning you remember it and your stomach drops. In daylight it reads meaner than you meant. There are already replies. People you know have seen it. The post wasn't even that big a deal — you were just tired and the words came easily. Now it's sitting there with your name on it.