I would agree with the author here. It makes more sense (at least to me) to use "disorderly conduct" or "drunk in public" laws in this case. The DUI laws were designed for automobiles and I think it calls for a bit of stretch to use these for bicycles.

California at least makes it very clear what the legislators intended for bicycles. I think that at least some of the folks who put together New Hampshire's DUI laws would be suprised at their use in this case.

Dan