I'm concerned these features in specific may be used by abusive spouses to track and control their partners (or extract revenge upon them). It's honestly pretty grim when you can't even use the "shared" (abuser likely would be the sole 'owner' on the title) vehicles to escape an abusive situation. Any upside of this kind of feature is very must overshadowed by the abuses enabled.
Additionally, I'm sad that if I do something stupid in a parking lot (say I fall and hurt myself) that the video can be recorded by any number of vehicles and posted to facebook/youtube/etc for yucks. Nothing can be done about it, there's no way to stop it. I hate it, though, and I hate that people are excited for these terrible slipshod "features" that won't help them as much as they hurt others.