Is the AZ law in actual operation yet? Maybe we should see how it works in practice, before assuming that it will become suspect to be driving while brown.
In Maricopa County, which is far and away the largest jurisdiction in AZ, the sheriff already profiles heavily and abuses Latinos who are legal residents or citizens. Check out the recent report/indictment. This law, if cleared, would remove some of the few obstacles not currently being observed to preventing him from abusing minorities. It would require a massive change of his m.o. of the past 20 years for him not to profile.