I used to taunt and tease Kid Sister #2 with threats that I would vote for anyone that promised to extend the school year, because I thought it would be good for her to attend school all year round. There would be a flurry of indignation tossed my way, and I would only laugh and carry on because I had the franchise and she didn't. This was described as "entirely unfair" and perhaps it was, but I didn't make the rules, I could vote her into submission and there's nothing she could do about it.
Heinlein was right, voting is force, political force, and there's nothing like a little force to resolve issues one way or the other.
I'm sure my kid sister will be pleased with the idea of 50 hours of community service tacked on to everything else to graduate from high school or whatever. And it's not even my fault!