I always slow down when someone tailgates me... didn't think of that as an asshole thing to do. An asshole would pull the handbrake (pro tip: no brake lights).
I guess not letting people in who wait for the last second to change from a closed lane when it was announced for miles makes me an asshole too. I've come dangerously close to some, but he drives a BMW - his rims are worth more than the resale value of my entire car. We'll see who chickens out first.