The options in Post Fields are too dangerous and there is no option to hide it if you will never use it.
My client looked at the option Title inside Post Fields and thought it was usefull to make titles on some questions with multiples sub-questions in the form. But they would get strange posts if they had publish the form. I had to explain to him again about these fields. But, could you provide on configuration panel an option to hide this box "Post Fields", sometimes we will never use this and this can cause many problems if the client don't understand exactly what it does.