I wouldn't. Tiff is the most famous auto journalist in the world, and former Grand Prix driver. I would be honoured if he asked me to test drive my cars. His passion for the automobile is amazing though, its so real unlike Clarkson.
I'm no idiot, I'm fully aware of who he is. It's the moron's driving around who could care less if he got pushed into a ditch that'd I'd be worried about.