I've never seen his response to these things. How does he react to them?
I saw video of him on a sports talk show, he was reading the jokes and poking a little fun at himself. I'll try to find the link and post it. I've heard that an interviewer once asked him about David Carradine's ability as a martial artist and Chuck responded: "He's every bit the martial artist that I am an actor" or somesuch. Of course, it's a quote from some puke on a message board, so assume a questioning attitude.