Two posts in a day!!! That's unheard of!!!
So I created the image you kind of see to the right: a "Drizzt Do'Urden for President" image that I intended to make decals, bumper stickers and even a political yard sign out of thanks to CafePress. I even considered making it an undisclosed reward in a Kickstarter I'm thinking of launching in the near future.
But my past experiences have taught me a lesson: when you are going to use someone else's name, ask first. So I sent an email to both WotC Customer Support and someone on the WotC Brand Team. I actually don't know for sure whether my inquiry reached the brand team, but the response came from Customer Support.
Unfortunately, we do not grant permission to use the D&D artwork to create, sell or otherwise distribute products as you've described here, beyond what's normally allowed by the GSL.
Uh... That doesn't exactly answer my question. I'm not using "D&D Artwork", I'm using a D&D name.
I know that D20 Monkey had issues with his Mordenkainen shirt, but I hoped that was only due to the upcoming Mordenkainen book. Then again, Drizzt has his own board game, so maybe I'm not so far off.
But, to be honest, "we do not grant permission" is really all I can afford to hear at this point, and I'm not about to dare firing back with a "that's not what I asked" email. So I have pulled all the images from the sites I posted it on (such as DeviantArt).
For now, my car will simply have to be the only car on Earth making such an awesome political statement!