Voting anti-incumbant isn't even a good idea. What IS a good idea is to vote for the candidate who matches your own individual principles/values/stand on issues the most. Simply voting anti-incumbant is like voting against someone rather than for someone who fits the bill best for you.

An elected position wasn't a life long career, nor was it a privilege. It was an honor...something to be cherished and something a person gave their all for...something that they could take pride in - knowing they did the best they possibly could for future generations.