Well, the Ford Sync does lock out some features when you are moving, but they don’t tell you (as near as I’ve found) just which ones they are. Even my TomTom that I had used did that, also.
Both support voice recognition, altho I haven’t played with that yet. Not sure if that might be as confusing to the driver as some of the other things that are known to be bad.
I had a Garmin GPS that took great delight in calling an old girl friend at random. Must have been picking something up from the radio talk show — but why always the same gal? Maybe the Garmin and her cell phone had something going?