Chiming in, if you're doing ranked choice voting (which is what it is from my understanding) then nominees should be allowed to vote for themselves because it won't "negate" the rest of their ranked choices by voting themselves first. And also that makes it awkward to send in votes to a current nominee because they can see where you "rank" them - it's not just whether or not you voted for them but where you actually put them in a line up of all the candidates and can affect how people vote, not that they don't trust that you will report things accurately.