Are there Bad teachers? Is Mara in the Sanga? I have had an experience with a top teacher, Regional Assistant Teacher, and Center Manager acting in ways very disturbing to the path. Later I saw clearly that they were controlled by Mara or had energy in the Mara realm, may be interested in making very difficult Sankhara. How can a serious student navigate these dangers to reach liberation? If the Sangha has lies, killing beings, Traps students and Practitioner s in a the type of life a student of Buddha seeks to be free from? Are these dangers in monks? Can we admit and face what influence we have acting upon us or act out ourselves or will this lead to more ego I am, I am not... Etc. More confusion and controversy.
There have always been bad men robed as monks. If we have clear moral discernment, we will avoid them.


  
  There are many evil characters and uncontrolled men wearing the saffron robe. These wicked men will be born in states of woe because
  of their evil deeds.
  It would be better to swallow a red-hot iron ball, blazing like fire, than as an immoral and uncontrolled monk to eat the alms of the
  people.
  
  
  Dhammapada