I agree on the "whitelist" system as this would really filter genuine/real people from those that just want to leech and get a hopeful upvote from Musing.
This might seem like an added task for the Musing team but if other platforms can do it, I believe the Musing team can too. XD
I however have to disagree on the delegation system. Sorry! XD I feel that it would just deplete @musing's VP, making some answers/questions left unvoted. Maybe another kind of token system benefit would be better?!
Good suggestion though! XD