I like the "DLI" offense.
Though it would require that the officer has a similar modicum of common sense.
I also use a brushback type maneuver often, but I find that they quickly move back to the center of their lane as soon as they see me out their driver's side window. Perhaps I'm brushing too close. 
Mebbe not, but the way I do it, I'm not ever close enough to them for them to hit me, but it seems to the driver that he was that close to me. I think that's why it works for me against trucks and buses. Here are some other choice moves:
The Parting of the LanesEver need to get into a lane and no one will let you? This move usually works well for me. Instead of trying to fight your way in, start looking in your glovebox for something, look in the back seat, look on the floor of the passenger seat -- above all -- make sure your head and body are moving all about. At the same time, let your car drift randomly within the lane, and start to drift toward the lane you want to get into. People tend to get a bit worried and give you room, even in places where people aren't generally paying attention to what's going on.
Maintenance of Right of WayI spent years in the Boston area, where right of way is pretty much a sport, especially in rotaries (roundabouts). Drivers coming into the rotary are
supposed to yield to drivers in the rotary; however, in places like Boston, drivers entering the rotary feel it is their patriotic duty to cut off anyone in the rotary. The problem is that someone entering can almost always box out someone in the rotary because the one entering has a better position.
Soooooo, what do ya do when you see someone creeping out? You accelerate,
and don't go for the gap. Accelerate and aim directly for the driver's door. The driver takes one last look in your direction, craps his/her pants, and stops. It sounds more dangerous than it is. If he pulls out (this only happened to me once), you follow in behind. I never accelerate to where I couldn't stop if needed. Plus, as you are accelerating, you create a gap behind you should you need to slow down.
The above move also works for cars slowly pulling out from the right in front of you. It can also be used against pedestrians in the city. I will stop dead for peds in a crosswalk, but I feel that some pedestrians could use education about the benefits of using the crosswalk. If you start to go around jaywalkers, they will continue toward you. If you accelerate and aim toward the curb, they hop back. ;-)
Preventing the Cut InEver merge politely ahead of a construction zone/lane drop, etc., only to have someone go zooming up to cut the line? People tend to try to prevent this by keeping close to the car ahead, but I think the key is to edge as much as possible in the direction of the car/truck trying to cut in. First, I edge out so that my bumper is outside the bumper ahead of me, giving the cutter no edge to cut in. If the person persists in trying to force me over, I cut in his/her direction as he/she is trying to do the same to me.
Unfortunately, none of these work on a bike. Believe it or don't, I am an extremely courteous driver; I just appreciate the same from others.