there's no "system" based way of blocking "self voting" because the poll options are just boxes, not linked in any way to a particular person other than the text in the narrative box. So - what I's suggest going forward is making the polling visible, and the person who sets the challenge/opens the poll states IN The polling thread if self voting is allowed or not. If not - and someone DOES vote for themselves, they're DQ'ed summarily. If it's allowwed, then it's up to the individual as to if their conscience would allow them to vote for themselves or not. Personally, even if it WAS allowed, i'd never vote for my own - I think its - to use an archaic phrase - "not the action of a Gentleman".