The accepted answer to How can I get dramatic shallow DOF with a kit lens? is factually incorrect (before I edited it). That's reflected in the consensus votes and in the other answers. Yet, there it sticks at the top of a very common question often linked to. Both the questioner and provider of the mistaken answer are no longer active on the site.
I edited the accepted answer, but I'm not super-happy with that as a solution. Another option would be to replace it with a new question asking basically the same thing, like Should I use my kit lens at max aperture or max zoom for shallow depth of field?. (That seems narrower, but it really isn't, when combined with How can I maximize the "blurry background, sharp subject" (bokeh) effect? as linked in the first question.)