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Before I cast my vote, I should say that moderators don't deserve a 'User of the Year' award simply because they have more powers to be more helpful than users. It is unfair, lame and I don't like it.
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I will gladly re-state what I wrote somewhere else:
YOU, the community, decide who enters the poll.
If you don't want staff members to receive an award, then don't nominate them (note that this is what you did, so this is merely for clarification).
Simple as that.