feature/open_polls

A public flag means that at the time of voting a user's name and avatar is added as their vote indicator (usernames appear in the hover-over too because some users won't have an avatar).

Badges are shown on polls to indicate if the voting is public (and allow multi voting - as there was no way of knowing this before).

It might be useful for deciding which features go into a release. If someone votes that they are very much against a feature that is generally supported then we can ask why they're against it (they might have thought of something important we've missed).

I won't write a joke about spotting buzzkills, cause this has more serious usages as you've pointed out Adam.
Fair points as always.

Could be useful.

As often happens, people might find creative uses for it. I can imagine an open "ready to continue?" poll with only one option. It’d allow the game to track if people have anything to add.