Putting Code out to Pasture: DontBeRetardedExceptions

Say you've got a Really Bad Implementation of something. You go right ahead and refactor it, but you can't be sure you've nabbed everything, so you add in a @deprecated javadoc flag and prepare to kill off the code.

Your resident specialist then proceeds to actively ignore @deprecated and make use of your old code in ever more interesting ways, duplicating functionality and causing headaches.

How do you stop it?

class Logger {
   public static function debug($message) {
        //Your standard debugging logger method(s)
   }

   public static function deprecated($message) {
        if (Config::isTestSite()) { throw new DontBeRetardedException($message); }

        self::debug($message);
   }
}

function UglyCode() {
    Logger::deprecated("Don't use UglyCode()");
}

Stops specialists in their tracks!