I don't care about that law. You are an idiot if you don't either, GTF over a lane, step on the gas and get ahead of me, or coast behind me until i get on the highway. I ALWAYS do one of the 3 things in that order. Fuck common courtesy courtesy you will cause an accident if you don't yield. Be a defensive driver or don't drive at all.
One of the many rules of defensive driving is "Don't Prevent Others from Passing You". If I am getting onto the highway my pedal is to the floor since I have no horse power. Getting up to 65 is hard sometimes... don't make it worse for me because you want to drive 60.