I just recently learned that my democrat uncle voted in the last Presidential election and then returned to my dead grandfather's polling place and voted again in his name. What an A-hole. Then again, I live in Massachusetts, so I guess I can't expect things to ever get better.
I worked as qa poll watcher in the 2002 Florida elections. One of the poll workers showed me that about 1/3 of the people on the voter rolls were dead. (I was at a development for those Jesse Jackson called holocaust survivors.) Voting dead people is a common abuse and we should want the rolls to be up to date. However, I will feel as if we are just nibbling round the edges of this problem until NYC changes its 100 year old machines that can easily be preset.