Have had the car about a week and a half now. We're starting to notice more instances of people giving us thumbs-up gestures while driving. Since this has never happened to me with any of my other cars, I find myself wondering how to respond. So is there a consensus on what is the proper response to this? a) Thumbs up back? b) Simple Tesla smile? c) Floor it and leave them in the dust d) other? Just wondering if there is a thread-wide-established protocol we new Tesla drivers are supposed to adhere to.