I'm not sure why you are getting downvoted since you are essentially correct under the laws of most jurisdictions. I only see two things in your comment that m

I'm not sure why you are getting downvoted since you are essentially correct under the laws of most jurisdictions. I only see two things in your comment that might be nit-pickable, and neither of them should be sufficient to justify a downvote. (1) Saying "it's your fault" might be seen be some as implying that the person who slams on their brakes is the only one at fault. Most likely both drivers would be at fault. The tailgater for following too close, and the brake checker for brake checking. (2) You spelled "brake" "break".