I think this thread has devolved from a simple heads up into a statement piece not related to camping at the Fort.
You are right. My post was a little over the top and a bit rant-like. This probably should have been in the Camping Community Board.
To try to put this back to it original purpose ... I have been digging into this a bit more because it affects me directly (I live NW of Atlanta and work NE of Atlanta) and so I'll pass on a bit more of what I have learned, but there still seems to a lot of confusion.
You can not hold or support the phone with any part of your body. It can not be in your hand, it can not be in you lap, and some question as to whether or not on a belt clip is OK or not. I usually have min in my shirt pocket and that is also questionable, I will change how I carry it just in case. The phone must be mounted, laying on the console, or something along those lines.
You can touch you phone to make a call, dial a number, etc. as long you are not holding or supporting the phone. You can not manipulate an app except for GPS, and that is limited as to what is allowed. For GPS your can move the map, but not set the destination. You can use music apps if you set the up before you start, but once on the road not set them up, or change them once you start. You can use any voice operations (speech to text, text to speech) as long as you don't have to manipulate the phone. You can not use any apps that have video (except moving maps on GPS). So you can not take pictures of how bad the traffic in Atlanta is, take pictures of funny bumper stickers, or take selfies. An you definitely can not post those on you tube, face book, instagram, or tweet it.
For vehicles that have features that put functionality onto the vehicle's radio/screens (music, gps, text readers) you can do anything you need to as long as you are doing it through the vehicles system. You can also use your phone in anyway you like if you are legally parked. Is pulled over on the side of the road legally parked, don't know.
The only real exception to any of this is for emergency use, such as calling 911.
The rules are different, and much stricter for, commercial drivers. From what I have been able to find, this is not limited to truck drivers, but any commercial vehicle use.
I do not know how the commercial laws apply to driving a commercial type vehicle personally (such a pulling an RV). Maybe PaHunter or someone can provide more info on that.
please note this is all based on my understanding at the time of writing this. I am in no way a legal expert, law enforcer, or anything like that. Just someone trying to figure it all out.