My positive ethical scenario for you is as follows:
I work for a fairly decent size civil firm. We do work ranging from subdivisions, to dam renovations, construction inspection, and highway design. About 7 months ago, the firm pursued a project from a college (happened to be my alma-mater), and one of my classmates is now an employee of the school and was on the selection committee. My illustrious marketing department *embellished the locations of some personnel working on the project. I was very upset, because I actually keep in contact with the guy on the selection committee as he used to be our class president and wrote our class notes in our alumni review. I was also furious simply because they misrepresented the company in general, not just to the college from which I graduated. Anyway, I made a pretty big deal about it. A month ago, another proposal went to this same college and before it went out I said, "It will be accurate, correct, and honest, or my name won't be on the org chart." They sent an accurate, correct, and honest proposal the second time. So, yes, sometimes they do things that are unethical, but sometimes they heed their employees concerns and change their tact, and all it takes is one person to take a stand usually and people will follow suit.