No, but they do have "I'm really a hub with a keyboard and a mouse (and a mass storage device) behind it". Or, if you go for simple but (too often) effective, "please autorun evil.exe". (Also, how well-secured do you think your USB stack is? It's been exposed to tons of shitty devices, of course, but proper attacks?)
Unless someone invests time into creating a safe, open-source USB passthrough device. I imagine it wouldn't be that hard to do for specific USB classes. It could even spot a "charge-mode" switch which cuts data lines as an option.
USB isn't to be trusted, either.