You've never said something then thought better of it seconds after posting? Or perhaps you posted something as factual, but moments later figured out it wasn't?

Its one thing if your comment has been sitting for hours or days and is part of the conversation, I won't delete those even when I'm wrong. I'll just do an edit and change to strikethrough. However, if its literally seconds and you realize your post is just unnecessarily inflammatory, or reading further comments leads you to sources that you find you are wrong under a minute from posting? Yes, I'll delete those. No reason to waste other people's time when what I ended up added is a net negative to the conversation and I know it. I can't say I delete often, but very occasionally.