According to FAIR this bill will not allow police to stop anyone and ask for immigration status just because they happen to look Mexican. It will however allow police to stop someone who, say, commits a traffic violation and if there is suspicion that the driver is illegally here (more than just skin color and name) THEN they'll ask for proof of citizenship. So in the end, only those who are here illegally and stupid enough to commit crimes, felonies, traffic violations will be in trouble.

But if it is found that police are targeting people based on skin-color then you can bet that civil rights groups or the federal government will step in to help stop that from happening.