As I have posted in other threads here, I deal with this quite a bit in the small town that I live in TN. It's one of the two. Some guy in a jacked up "Bro-Truck" with more lights than the driver has common sense that wants to race or someone in a P.O.S. jealous because your car is nicer than theirs. On a rare occasion you get some kid in a ricer who thinks his car is lambo and wants to drag race.
OP, to answer your question, it isn't a BMW thing. Happened in both of my BMW's, my Infiniti and both of my IS350's it's a jealousy/reverse jealousy thing in my opinion.
I've found that the best mentality to have is to try to stay out of the way of other drivers who "need" to be driving faster than you and remain emotionless about how they are driving. If everyone did this, driving would be so much more fun.
By the way, these speed limits you guys keep speaking of; are these posted on the fuzzy looking white signs with the blurry numbers I can never read?
