I'll keep this short and to the point: Bluetooth headsets are sickeningly cheap. Please, please buy one and use it when you drive. Yesterday, I was almost killed three separate times by other drivers. One was a guy who almost changed lanes right into me, one was a woman who almost rear-ended me, and one was a guy who slammed on his brakes in front of me to make a left turn from the right lane. All three of these drivers were talking on cellphones.
There are literally hundreds of these drivers on the road and since they refuse to stop talking while driving (despite mountains of research saying driving while on the phone is unbelievably dangerous), then maybe at least they can use a headset.
Yes, I know that there is also research saying that using a headset is very little, if any, safer than holding a phone to your ear, but it's better than nothing. I honestly don't understand why people refuse to use headsets, especially considering they're so cheap. ($8.50, $9.00, $10.00, etc.)
So, that's all I really have to say. Please buy one, use it, and stop trying to crash into me while I'm driving.