If they test you for simply looking like you do them, then it's definitely biased in my opinion. They'd have to test at least one other person in the company to make it look legit, otherwise you'd have a serious lawsuit on your hands even if you came back positive. Now, if you are starting to act like the medias version of the Steroid user(with the fake rage & shit), then they would have the right. Otherwise, I doubt they'd test you for just looking big. They know there is a legal problem-in-waiting in doing that.