Vote manipulation is getting more common. Some recent examples:
While the accounts were banned, the malicious voting activity stuck around.
Should admins have the ability to discard votes, and if so, which admins? Should community mods have that ability? Can you think of any ways that tools like this could be abused?
Voting is an indicator of agreement/disagreement and will influence how people feel about a certain post.
Keep in mind, most people are just trying to look good in front of their peers.