My first thought was, what if it's a sheriff, police officer, or state patrol? Now you've got a couple nights in the county lockup, a reckless driving charge (this can be a misdemeanor or felony depending on the severity), and $thousands in towing and impound fees.
I don't think abrupt braking constitutes reckless driving (maybe it varies by location), and it seems like it would be pretty easy to fight by claiming you saw a deer/etc in the road. If the cop says he didn't see it, you respond with some variation of "unsurprising because you were following me too closely to see anything else". Of course, none of this absolves Tesla from fixing their software.
I can't imagine a cop anywhere in the world responding well to the phrase "unsurprising because you were following me too closely," especially if s/he already thinks you were brake checking them!
