What was the speed limit? 80? You're going to call the cops on a guy doing 83 in an 80? Really?
IF the tires are rated for the speed and if the speed limit is that high I have no problem with it. Even if the limit were 75 I don't think it's that bad. I certainly wouldn't follow the guy or call the cops. Can you imagine if every time anyone saw someone doing something they didn't personally approve of they called the law? What a way to live that would be.
I normally have 65 MPH rated tires so I don't exceed that. I would have no problem doing 70 or 75 if the tires and limit allowed.