The Idaho experience seems to indicate that their approach can work. I've not heard otherwise at least. My question, as chair of the Legislative Committee for the California Bicycle Coalition, is what problem would this change in law remedy? I know a cyclist who was ticketed for not putting a foot down at a stop sign, but I don't know that such foolishness is wide-spread enough to justify the effort and expense to change the law.
My view is that we need to pick battles that will have a broad effect, and that will contribute to raising the standing of bicyclists in the community. As benign as this change might be, I'm not sure it would do either.