User :after or :before CSS selectors to show active stylesheet.

Does it make sense to add rules to the starterkits to display the active stylesheet.

eg
within ...narrow.css

nav:after {
  content:"Narrow CSS";
  color:#f0c;
  font-size:.7em;
}

If you add the same rules within all the other stylesheets you get to see which one is active when resizing. Not sure if this would be an annoyance or a helpful feature for new Omega themers.

Maybe it needs to be a debug feature Omega tools?