How often do you click "Cancel" instead of "Post"?

[Killergran]

I've started to realise that about a third of the times I start writing a post, I hold back and don't post it in the end. Either because I have difficulty trying to express my point of view clearly, or because I realise there's no point arguing. I have also cancelled inflamatory posts at times. So I'm just wondering, do any of you press the cancel button from time to time?