Yes, loads of TV sets all around the country are set wrongly, especially in hotels and pubs. If the TV is a widescreen TV, then you need to set it to widescreen and not zoom etc. Also if you are using a Virgin Media or Sky box, you need to get the settings right on those as well.
If you don't get this right then you are losing a lot of the picture, which defeats the object of widescreen TV.
If people are stretched sideways so they look fat, and if on say BBC News 24 you can't see the titles at the bottom of the screen etc then you have not got you TV set correctly.