Maya, it will always be an optional thing. And anonymity wasn't really a big deal for us. It is just more complexity to show all the voters. That said, if the model doesn't work then we can change it. Time will tell.
Probably also worth pointing out that votes aren't truly anonymous. The database does know who voted what.
But, you know, you might just need to get used to it. It's new, and new things take some time.
EDIT: modgrl's post reminded me of an important point. Many polls are not the kind that involve personal feedback, but are asking for an opinion on an item. Like, if I posted "Ex-girlfriend jeans, yay or nay?". Nays in this context are not feedback that I would necessarily want to deconstruct. I would just want a quick straw poll on how people felt about them.