Nancy Shurtz please hang in there and fight this lynch mob.  I suspect that you had no negative intentions toward anyone.  The notion that you knew that black make-up was forbidden is contrary to the notion that diversity is tolerated at UO.  If you resign, you re-enforce this extremely pernicious behavior pattern.  It is those who have so little regard for your life and happiness that should be expelled from the University.  I am sorry you must endure this.  Be brave.  Persist and you will teach tolerance and respect for diversity.  Resign and you encourage mindless mob thinking.