This feature, which could also save my life, makes it marginally more difficult for people in general to be complete sociopathic animals, And That’s Terrible.
Somehow.
Apparently.
You got something you want to confess to the rest of the class, usedtobe?
Turning off this feature wouldn’t protect against the threat you’re worrying about.
Not linking your phone to your car would help (although it’s not 100% foolproof. If someone can hack your phone to hack your car, they may well be able to hack your phone to exploit a vulnerability in your car’s Bluetooth stack and force the link to your car in the first place)
Not letting any internet-connected telephone within Bluetooth range of your car is the only way to be sure. Good luck with that.