[eugmill]

My best car "feature" was a rental I had that when connected to bluetooth and driving, would auto-reply to SMS messages with "I'm driving and can't talk right now".

At the time I had facebook notifications send me sms messages, and if you reply, it would post the reply to facebook.

I had left a bunch of "I'm driving and can't talk right now" comments on random posts without realizing it until days later.