Perhaps you ought to buy a decent car?
I have found BMW and Audi drivers to be perfectly polite and curteous whilst driving my Jag and my brother confirms that they were nice as pie to him in his, and didn't stop being so when he moved to the, inferior in my opinion, S-Class Mercedes.
I don't recall having any issues whilst driving the Piffling Mondeo Ghia or V6 company cars in past employment either.
Had a mate with a Focus ASBO too and despite its working-class aspirations he reported no trouble. Heck, I once met a bloke with a Skoda Cupra of all things and he assured me the BMW and Audi drivers were always curteous.
(Me, I'm not... in any way intoxicated, Fri 2 Aug 2013, 18:50, 1 reply, 11 years ago)

Ferrari drivers treat me like shit though

( 2 Can Chunder Word to your mums, I came to prod bums, Sat 3 Aug 2013, 0:10, Reply)

...and don't get me started on the Bugatti lot...

(Me, I'm not... in any way intoxicated, Sat 3 Aug 2013, 8:24, Reply)