Of course it's more than just the right to "complain". It's a right earned in wars, bloody demonstrations for civil rights and marches for women's suffrage. It's something that radicals on the political right want to curb or deny altogether. So get out and vote.
BONUS: The League of Women Voters has a great web site giving you accurate information about your polling locations, candidate positions, and much more. So, no excuses.
(cartoon: Steve Breen, San Diego Union-Tribune, via Gocomics.com)
