Check Import Casing

    See also http://sartak.org/2014/04/compile-time-error-for-incorrectly-cased-import.html
Ban problematic symbols

    See also http://sartak.org/2014/03/skshapenode-you-are-dead-to-me.html
Forbid complex method stacking

    See also http://vimeo.com/90392399 roughly 27m in