I hope none of you drive like this when you want to pass someone or get them to speed up, it's very rude and doesn't accomplish anything. If you want to get around someone just wait until the other lane is clear and pass them that way.
I also hope this hasn't happened to you but if it has, the best way of dealing with these people is to simply get out of their way. Whatever you do don't get drawn into a race with them. Don't stoop down to their level, it's not worth it. Not only is it dangerous to you and other drivers you also run the risk of getting a big ticket.
If you ever find yourself frustrated or angry don't get in the car drive somewhere. It has been proven that after a fight with someone you are far more aggressive behind the wheel of a car. Let's be honest at the very least your pissing off other drivers and only making things worse for everyone. Not to mention the other things that could happen as I stated earlier. Put simply it's not worth it. Getting angry and driving badly just isn't worth it and who really enjoys being angry?
Just drive safe!