If I could reach into peoples' heads, there's a solution: "mind your own damn business". If we didn't care so much what other people did, then we wouldn't disagree so much. And in general, I think the world would be a better place if more people did this. But some fraction of issues will always affect multiple people (that's the whole point of government, after all).
And besides, nobody's yet invented a mind-control ray, and it would be pretty icky if they did. (There's a certain irony to altering peoples thoughts so that they care less about what other people think...)