There is, of course, the (unintended?) side-effect that if there was a cost-effective way for controlling peoples' behavior then we would be effectively under t

There is, of course, the (unintended?) side-effect that if there was a cost-effective way for controlling peoples' behavior then we would be effectively under the tyranny of whomever possessed those means. Sometimes we just have to let other people live with the consequences of their actions; which is hard, because often we also have to live with those consequences. Whatever we say about "other people", we should also remember that we are "other people" to somebody.