This photo of Dana (courtesy of whatvinniethinks.com) was taken at the Spooky Empire convention in 2008.
The fan in the photo, Vinnie, wrote on his blog:
Dana Snyder was a funny guy. On his autograph photo he wrote, “Always remember… Meatwad stinks!” But I liked Meatwad. So he made up for it with a different one. “Always remember… Meatwad’s the greatest thing in the universe and I’d never say he stinks in a thousand years.” Dana even drew lips on Meatwad saying, “I love you. You’re delicious.”
Here are those two autographs: