Well, I had a real close call due to my own slightly aggressive driving and the response of the Collision system. There was a car in the left lane this morning going 50 in a 55 (aka 75 during rush hour.) People eventually started to pass around her on the right and jump back into the left. As I went for my move the car abruptly started braking and cut the gas because it thought I was going to hit the car in the middle lane as I was moving to the left lane. It basically acted like I was brake checking the lady going slow in the left lane. Thankfully she was able to stop but it scared the crap out of me and her. I felt really bad. I had my foot on the gas and all of a sudden the gas pedal was cut off and the brakes jammed on really card. If the system had been off it would have been no problem. I didn't think the move I was making was nutty. It was aggressive but there was at least two car lengths for me to move into.
Anyway. The system works and is extremely cautious. I decided to leave it on and just chill out but I would turn it off if I was trying get some where quick and needed to make some tight passes.
Sorry to hear about your scare. In situations where I am focused and the driving is aggressive (mostly other drivers) I plan to turn it off. In my area its not unusual for drivers to cut in front of other cars without a lot of space between. I'm used to it and can see it coming, but this would set off the CMBS.
I no longer have a daily commute, but that would probably be one of the situations I would disable it.
So far, I've only gotten the flashed warning, but braking has not been initiated.
