Every time you get that feeling in your chest, you know the line is crossed
What I am talking about is that true north, that moral compas we all have, although some folks find it hard to listen to it. If it feels bad, and you have asked yourself some honest questions and it still feels it goes against your grain, it probably did cross a line.
Few examples - a manager who ignores an open door policy and it turns our that there is repercussion for something you have told them in confidence.
A boss or manager who gossips and you find them out.
A boss who asks for feedback on company culture at a staff conference, and tells you to shut up when you do raise some concerns.
A boss who under the guise of organising farewell drinks for an employee who has resigned, arranges for an encounter session with other company employees to brainstorm what needs to be fixed.
A boss who only favors a chosen few and does not treat folks with equality.
I've seen quite a few of these behaviors, they are not rare. I always listen to my gut, learned that the hard way. If you hear a little voice inside saying That is Wrong - try to address it with fairness and objectivity, then make a choice. Life is too short to sacrifice your integrity. Listen to your true north.