As another user pointed out, what about an LGBT person wanting to upvote something but not feeling safe if someone knows their username? Or a woman living in a place with abortion bounties wanting to upvote something about how to get help, but being afraid to?
Or someone with an abusive spouse who might read between the lines (correctly or incorrectly) of what you upvote/downvote and get angry about it?
There are a lot of highly significant real world ramifications to having your vote history publicly accessible. Losing your job and life or death consequences far outweigh the online voting system considerations.
The possible problems caused by this FAR outweigh the possible benefits. People are just not thinking this through enough to see how badly it can go.
For moderate misbehaviors, they will be asked to be respectful. If they refuse, they will be banned.
For severe misbehaviors, they will be instantly banned.
However, I need to point out that moderation abilities on kbin are positively primative, as kbin is very new and that side of it has not been flushed out yet. So I'm hoping that by the time activity gets up to speed, the moderator capabilities do as well.
But here as well as on Reddit, the key is having members report improper behavior so that moderators are aware of the issue.