Stay In Your Lane, Jackass!

I was driving down the street and this guy in a BMW is weaving in and out of traffic. He's cutting people off and is speeding. I see all this in my rearview mirror so I was prepared in case he decided to cut me off. Sure enough, he speeds past me on the right and cuts me off to get into the left turn lane ahead. Ok fine, but now his car is about 2 feet out of the left turn lane causing me to have to jog to the right (and out of my lane) to get around him. How irritating!