I said that they can know this data, not that they will... Not requiring data reporting doesn't mean that the data won't be reported, as you seem to be already

I said that they can know this data, not that they will... Not requiring data reporting doesn't mean that the data won't be reported, as you seem to be already aware of. I am also in no way in support of the things you're referencing, just because they already exist doesn't mean it's just OK to accept further erosion of privacy. ALPR, cars with cell modems - these things are part of the same "slippery slope" of privacy wrt cars. As far as I can tell, you're saying "what you're worried about is already happening, so why bother being concerned about it getting worse?". How exactly is that helpful? So maybe you're right, this isn't a "bad first step" - because it's actually the continuation of steps along a path that was no good form the start. The point still stands that having the government get involved, making it a legal requirement for new cars to develop these bad systems, is a bad thing for individual privacy. It's not independent of requiring speed alerting, because the government is effectively saying "not only do we not care that this is happening, we're now requiring it".