In the last year I moved out of Washington state in response to the passage of 1639[1] and other similar laws. Unfortunately I will likely be paying more taxes now since the state I moved to has an income tax while WA did not. I can agree that it is probably uncommon to move in order to be away from one particular law, but I doubt it's too uncommon for people to move to an area that shares a more common political worldview.
1: https://en.wikipedia.org/wiki/Washington_Initiative_1639