alt Hacker NewsVoter ID was an issue in my country. By law everyone has to carry valid ID on them at all times.
But it is considered vital that every citizen gets the chance to vote including homeless people so they had to find a compromise. Although ofcourse the number of hobos who want to vote is largely theoretical.
In my country that group of people is surprisingly active voters (where I live there a lot of discounts for disadvantaged people to get ID - hard part is queue in migration office) and coincidentally there good people which organizes buses to make easier travel for vote.../s On more serious note is very open secret especially in small counties .