You said that the burden of proof lies not with the person making the claim, but with someone else to disprove.
yourlogicalfallacyis.com
Oh, and you can tack a straw man on to that, because nobody has claimed that anybody
has died yet - just that the false alarms are creating a risk (we
do have crystal clear evidence that the false alarms are happening, and it's not rocket science to see that dealing with false calls can cause risky delays).
It's up to the people advocating crash detection to prove that the benefits outweigh the risks - preferably
before rolling the product out to millions of users.
A good start would be to compare the number of people dying in car crashes because nobody called the emergency services in time, vs. people who died when the emergency were called promptly but arrived too late (where any sort of false alarm can be a factor). Now, I don't claim to have the data, but thinking about it, the first will be something that happens occasionally out in the sticks where there are no passers-by to raise the alarm, while the majority of fatalities are going to be occurring in heavily populated areas with plenty of eyeballs but overloaded emergency services.
A handful of self-selecting anecdotes where crash detection happened to work spectacularly (which often don't actually prove that people would have died without crash detection) don't really cut it.