I worked polls in Riverside and San Diego County CAL. If you came near the end of the day and looked at the list of voters posted inside the door (with those who voted already crossed out), you could pick a name and give it at the table and vote with no ID. You could also pick anime from the recent obituaries.
I resigned in 2008 after writing a letter to the secretary of state and the registrar of voters in SD asking them to dispel rumors and accusations by requesting Obama submit a birth certificate. The secretary of state in Cal had done that with Eldridge Cleaver and he was in fact too young and was left off the ballot.
I resigned because I felt the election might have a candidate who as committing fraud and no one in auhority would act on the allegations.
pick a name
I got a little creative and since I was there to serve the actual voters in my precinct, I set up two tables and called it the provisional spot. When someone came in and I could prove they were not in either of the voter rolls I would hand them a provisional ballot and have them take a seat. (These were people who were not legal to vote and were giving us the business.) They sat down and filled out all their stuff and then I just happened to be too busy to get back to them right away. I saw their faces go from. "I sure am getting away with something here" to "I am wasting my time here and I need a cappuccino." I made them wait for about 45 minutes.
I didn't see any of them next time to vote. They may have moved onto another precinct or they may have found out that voting illegally was not worth the effort.