Seems to me that everyone has given you wise advice - except the comedians with rockets and marbles.
Think about it - you want to live and you want to enjoy the ride. Stay out of trouble and trouble spots. Also, stay out of the way and no one will be able to "cut you off."
Generally, the cars in front of me are my blockers - If I don't want to get nailed, I stick pretty well close to them - behind them. Guys behind me are on my team and if I'm not in their way, they don't have to go around me and "cut me off."
Stress and anger are out of place on a bike. Since the rider has absolutely no protection, ride calmly and enjoy it. The last thing you can allow yourself to do is think about getting back at someone.
Now, if you are in a hurry and stuck in traffic on the way to work or school - take a bus! I think a bike is a lousy way to go to work or school!
There's a thread about fallen riders. Maybe time for a read. Notice the locations!! Not typical pleasure riding environments, eh?