The English 'Tea and Crumpets'

There's nothing that annoys me more than watching an American TV show and they do an English impersonation.

There is always the need for them to mention 'tea and crumpets' and when this happens, there's me having this urge to pick up my TV and throw it out of the window.

Note:  NOT EVERY ENGLISH/BRITISH PERSON EATS TEA AND CRUMPETS!!

Now that that's out..

Question: Why do Americans have an addiction to the English accent??

Strange Logic

Why do the speedometers on an average car go up to 120mph when legally you can't drive THAT fast on any road?

If an orange is orange, why isn't a banana called 'a yellow?'

And why did the person or people who named everything name it as they did?

Question: Can anyone answer those questions or is it going to be unanswered forever :S