I think classist and elitist the first idea.

<blockquote>Whitelist: do not downvote if the user is on itr</blockquote>

The more control, the less freedom, the perfect formula for steemit's failure, with reference to history.

<blockquote>Bidbotted percentage: downvote only if bidbots represent x% of the payout.

minimum payout : only downvote if the post has reached x$ of potential payout
</blockquote>




https://cdn.steemitimages.com/DQmbMAarMoLfxeVXApL4XRUzp6iG4yciCDJ9XKHVoKYC6bx/q2.png


<blockquote>Number of words / characters, only downvote if the post has less than x words / characters</blockquote>

https://cdn.steemitimages.com/DQmemcgtC3EgEnveyxgkGZ3eB7sLuSeDyq5QVhFc5wryF6C/q1.png

The request lacks to vote negatively on account as the positive vote does, it only does it following a trace of another, it takes away people's own criteria.