There are several things I don't get about this inquiry.
1. It clearly says the following with 'Hero' subclass. "Note that this is a career with no exit. Once on this path, you can only become a legend, or a failure."
2. Infiltrator and Hero are both subclasses. It won't even allow you to click two radio buttons under sub class.
3. You specifically need to click the radio button next to the main/sub class you prefer and then hit 'Change Class'. This seems like an entirely different process than 'accidentally clicked the class name' -> which is not even possible.
