Sometimes I'd like to allow guests to vote (perhaps using ip checking to prevent people voting multiple times).
Sure, I understand that poll results wouldn't be as trustworthy, but sometimes the whole point of a poll is to encourage people to participate. Also, it is very frustrating for a guest to click on a poll topic only to be told "sorry, you can't read the results...". Yes, this might encourage some to register, but it'd be nice to have the choice of having the option to make polls where we let everyone vote or just registered members.