User blog comment:Care Level/MVP Status/@comment-10022923-20130826143803/@comment-9593635-20130827235811

The difference between this system and the Honor system is that one actually has a tangible impact. If you get honor, it's the equivalent of "Congratulations!  You were an honorable opponent!  Sorry about that 20 LP!"; if you're voted MVP, the statement is "Here, I don't think you deserved that loss.  You shouldn't be punished for it, so maybe you won't be."

If (A) or (B) from your post, a person can simply choose not to vote. However, if they choose not to vote and they really feel like they were the most valuable player on their team (as evidenced), they're shooting themself in the foot because they lose the opportunity to gain MVP benefits by not voting.