Authenticity?

I am all about authenticity when it comes to films and T.V. shows that are based in the old days. And when I say old days, I mean a century to several centuries. One of my newly found favorites is Game of Thrones; a show on HBO featuring one of my old favorites, Sean Bean. With this higher budget kind of show, the camera (budget) is definitely much more free to do what it needs to get a good, interesting looking shot. For example, in one of the first few episodes of the first season, a son of the king is shown climbing a huge tower. There are extreme high angle and extreme low angle shots- it isn't limited to showing the boy just climbing what would appear to be an endless brick wall, like some low budget t.v. shows might portray. This is a plus for the show, but some things bother me in it, and in any other show that are slightly similar. Authenticity. Or, small things that make the show extremely unbelievable. How can that man sleeping near the mud with the pigs get up and be completely clean? He shouldn't be. Is their accent British or accent-less? I can't tell. My biggest pet peeve has to be the hair. There weren't electric razors in the day so how is that young guy's head completely bald? Or, looks to be buzz cut? A big main point of films and T.V. is to entertain, and in some cases to convince it could or could have happened. The little things matter, especially to those who appreciate them when they are present.