このへんがNG例かな
http://img-cdn.jg.jugem.jp/9d7/749047/20120831_2165408.jpg
http://up.gc-img.net/post_img/2015/08/hIqiuecfl1Au458_jY9eb_141.jpeg
http://up.gc-img.net/post_img/2014/07/6rQQZuqSvVqsori_OeMb5_37.jpeg
http://livedoor.4.blogimg.jp/nwknews/imgs/8/e/8e803676.jpg