I mostly post URLs and when I first write a title, which I tend to do, and then paste the URL, the post button jumps down around the same time I try to press the post button when the system retrieves the title of the webpage and adds this as a title option.

When the post button jumps down, you easily erroneously click the NSFW selection button.

One could increase the distance or reverse the order or put them next to each other. Or remove the jumping altogether by reserving space for the pop-up title.