Not sure what your point is, but you are wrong about getting detained before. I know of many undocumented people who were stopped and didn't have a license and were just given a ticket for not having a license and sent on their way.

One even hit my car 15 years ago (I had a license) and was pissed and arguing and wanted me to pay for his car and he ended up getting a ticket for no license and no insurance. Another one ran a red light and hit me and totaled my car a few years after that and same thing, they got a ticket and were on their way. I have even known of some who were ARRESTED for DUI and still got out so it wasn't always like this.

I'm not saying arrests didn't happen before because we've all heard of an undocumented person running a red light and getting arrested when the didn't have a license and in smaller cities, cops are more likely to do that; but right now, many cities like Austin have a policy of not asking for immigration status if you're stopped.

With this new law, even if you have a license they can ask you about your status. I'm guessing they still need some probable cause to stop you first but that probable cause could be just that they feel you might "look illegal". Maybe you're walking in the wrong neighborhood and look "suspicious". This is a very dangerous law.