I'm not a native speaker, so usually I use some grammar checker tools to help me before posting. I write it down there and let them check the spelling and misgrammar for me; that's why I don't need the notes. However, if it's used to probably write down the topic or something that you want to post but don't have the time yet, then it's useful, I think. You can just add the important points to elaborate later, when you have time to post in the forum.