Here in WA, I am convinced that if a bike did that (even legally), cars would squeeze the line to prevent it (if not fully cut off a motorcycle). I feel differently about shoulder riding, tho. In stop and go, and low speed, I'd love to have the option of the shoulder (until you get to an on/off ramp, then I'm not sure how I feel).
We had a bill for lane-splitting, but it got amended for only left shoulder (with the same speed restrictions as full lane splitting, and a few other limitations). Perhaps that's a good gateway to get traffic accustomed to motorcycles moving past, and full lane-splitting may be an option in the future.
But I still don't think I'd lane split on the Concours... so flippin' wide.