Things They Should Invent: a blank on ballots for the reason for your vote

Some people vote for the Yellow Party because they like their Widget Policy. Other people vote for the Yellow Party because they don't want the Purple Party to come into power and raise import tariffs on three-handled family gredunzas.

But sometimes I find myself voting for a party for reasons that aren't as common or aren't something listed in campaign literature. For example, suppose the Yellow Party is really focusing its campaign on the widgets and the gredunzas, but I don't actually care about that. I'm more interested in the fact that they want to require all shoes to be available in sizes up to 12. But us large-footed girls are considered a fringe special interest group so the big shoes issue isn't getting a lot of media play. My Yellow vote will be interpreted - by the politicos and the media - as pro-widget and pro-gredunza.

I normally email any newly elected representative with a friendly congratulations and touch on a couple of the issues that are most important to me (credit to one of my early clients for giving me that idea), but a) I doubt that has any significant effect, b) I doubt most people take the time to do that, and c) that has no effect on media interpretation of the election results.

I want a blank on the ballot where voters can (optionally) write their reason for voting the way they're voting. Then, after the votes are counted (so as not to delay election results) they can tabulate who's voting how and why, and this information could be made available to the media.

It would also be interesting to what proportion of the population is voting misinformedly. We all know that some people are, but it would be interesting to see how many.