Breitbart California reports there is talk of automatically registering every driver licensed in the state to vote. Apparently CA's northern neighbor Oregon has just done this. I see two problems.
First, you can drive at 16 in CA, but are not legal to vote until 18, I believe. A drivers license does carry one's birthday so perhaps the automatic program can put underage drivers into a holding pool until they turn 18 before registering them.
The second problem is more serious. CA issues drivers licenses to people who are not U.S. citizens, including illegal immigrants, legal immigrants, and green card holders. My guess is that the DMV does not ask people's citizenship status, or in any way require proof thereof.
Once registered, non-citizens would have the logical notion that they could vote, something clearly prohibited by the Constitution. I want to hear how the legislature plans to circumvent this issue. Hat tip to Lucianne.com for the link.