Yeah I think that is worth considering.
I did think of a what if < 1000 SP = 1 vote, and then every 1k SP owned is an extra vote. It could be worth a look to see if there is any scope there.
Maybe the answer is when the poll is created no new accounts can vote after the poll creation
I think this is definitely worth implementing.
Totally agree. I don't think it'd be too hard to code either...
The account created date would be a really quick job.