Absolutely - there is no need to use a phone when driving, and hands free is no better than a normal mobile because it is the distraction of the call that is the problem. I know there are people out there who can drive, answer the phone, watch a video and bake a cake all at the same time - but if they have an accident they should lock them up and throw the key away.
many studies have shown that if you ask someone to watch a short film and then ask them questions about it they do pretty well when that is all they are doing, but when they have to answer a phone while they are watching their score drops dramatically. Human brain is not equipped to do this kind of thing, and i have had many near misses with people who were obviously more engaged in the phone than in their driving.
I used to work with a young bloke who's 2 mates were killed in a high speed crash, unfortunately the car hit another car coming the other way and killed a mom and her son in that one as well. Unfortunately the young drivers mom heard the crash and everything after it as well because he was on his mobile to her at the time.