Unfortunately, I think it's a BMW thing. For certain people out there the BMW badge is like a red rag to a bull. It seems worse when driving a newer model and/or one with a "personal" number plate - seems to bring out the worst in some people. I really noticed it when I got my first BMW, but I've got used to it now. I do notice the difference when driving a non-BMW loan/hire car or even the wife's MINI - people are nice to me again because I'm not driving a BMW.
2012 F10 520d M-Sport, Sport Auto, Imperial Blue, Black Dakota, Sun Prot Glass. V-spoke 281 Winter wheel package
Previous BMWs: 2009 E92 320d M-Sport, 2006 E92 335d SE, 2004 E60 530d ASE, 2000 E39 525d SE, 1997 E39 523i SE