I&#x27;m inclined to declare ploxiln&#x27;s Law of Negative Usability Cascades.<p>This dynamic does seem to strongly reflect how marginal UIs get progressively worse.<p>Don&#x27;t design for idiots.<p>Oh: and there&#x27;s some truth in the observation that 90% users <i>don&#x27;t</i> know how to do anything.  People are <i>far</i> less rational and sensate than we typically believe.<p>P.T. Barnum had something to say on that.