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?
For positive voting you could look at how quickly accounts upvote after a post has been made, combined with how new they are, and whether they have comments or not (maybe also if those comments seem AI-generated).