I'm constantly creating tiny little paragraph containers when I intend to create a single line of text. To prevent this, implement a threshold of mouse movement (or dragging) within which a single line of text can be created. For instance, if I click and accidentally drag across 5 pixels, there should be a reasonable assumption I want a single line of text. There's little chance any of us want to create a 10x10-pixel paragraph container. And if we did, we'd understand that, in order to create a paragraph, we have to create one above the threshold width, then resize it.