It's not like you walk in the door and everyone is sitting in a chair looking at you when the boss man tells you that you must clear your desk, or tools, and that you gotta leave the premises. All based on a "Buisness decision", not to keep you. Or "You're just not a team player". When in reality, its all because they dislike your political views, your style, your religion or your race, or whatever. Though not perfect, the union keeps that in pretty good check.