Electric cars do charge when braking. Obviously the energy recuperated is less then waht was needed to drive that fast in the first place. Using driving wind would just increase the energy needed to drive that speed and would be net negative.
"Made unusable": that's not how it works. Even with occasional vandalism, there's so much more people positively contributing, that overall the map just keeps on getting better and better.
It won't, but at least you're not part of the problem anymore. You might inspire other people to. And every person who goes plantbased makes it more politically viable to enact policies to encourage plant based over the most destructive other foods.
Try to avoid discouraging people who try to do the right thing, help them make a bigger impact instead.