All kinds of thinking are dangerous. If you want a lack of thought danger, I'm afraid you'd need a world filled with people who don't think at all. Consider,

All kinds of thinking are dangerous. If you want a lack of thought danger, I'm afraid you'd need a world filled with people who don't think at all. Consider, your kind of thinking is dangerous... to someone. (Probably millions of someones.) So is my kind of thinking. So is everyone else' kind of thinking.