Yeah, you could make two Google Shortener links with both linking back to Steemit. You just keep up with which is yes and which is no.

For example,

Should Steemit create a polling option?
Yes
No

The danger of this method is clicking a malicious link, so the only people that could viably do that are people that are highly trusted on Steemit. (Just to be clear, those links come back to this page.)