You can disable this in the AdminCP. Requiring a click is pointless for these reasons:

  1. It is only usable for a special thread display option no one uses ( you can even disable it in the AdminCP so no one uses it )
  2. Most people will simply click the next Quick Reply button, e.g. the one in the last post, even though they are replying to the first poster. This makes the required click pointless even though you have the display mode enabled.
  3. It is very annoying to have to click that button every time you make a reply.