Another reason you don't see many smiles was you had to hold your facial expression for a certain amount of time or the picture would be blurry, and smiles can be kind of hard to hold for that long.

(This whole thing is actually an experiment in Moscow, Russia. From what I can tell, it is on going and they don't know if it will work yet or not. )
I don't know where you are getting your info from, but the cow pictured in a Holstein cow, and they only live for an average of about 6 years. After you take into account the damages done to these things (cows can be kind of rough) and the cost of replacements, I am very skeptical that this will work.

I agree, just call off the wedding, and if asked, don't lie about why. Let her experience the natural consequences of her actions, and be done with it.

Actually, no, that's not what I was going to say. If there is a way to present an honest summary of the pros and cons of the given object being voted on, then this would be a very effective tool.
(BTW, I agree with your quote above about the best argument against democracy. To add to it, I believe it was Churchill who said it was the worst form of government except for all of the others.)