The fact is that not all worker need be treated the same or even fairlty. That is unless theirr treatment constitutes some form of legally actionable discrimination. Such discrimination must be due to being treated less favorably due to your race, religion, national origin, age (over 40), disability, or the like. Merely having a supervisor single you out for break violations simply because they don't like you does not give rise to claim. That is unless such actions violate the terms of any appplicable union/collective bargaining agreement or employment contract. Bottom line, a company can set the conditions of the workplace much as it sees fit.