For only $25 or something like that, you can get a piece of paper you can put in your wallet to show you're a member. For around $2,000, you can get a license plate frame.
He said even with the piece of paper, if you're pulled over, you have a pretty good shot of being given a warning. You just need to make sure you show it to them when they pull you over.
With the license plate, he said he would never pull over someone with the license plate, because law enforcement doesn't have enough money as it is and they'd rather not piss off those who have money to donate.
I didn't really believe him (grandfathers and all), but I donated anyways (for a piece of paper, not the license plate). Now I see this article, and I'm starting to think he was serious.