Even in this case, the farmer who are farming on their own land are under no obligation to change their way of life or farming process. Even though we know that the methods they are using may be sub-optimal and a net-negative in the long run, we simply cannot make them change it, and certainly never by labelling them negative. We can make them see the benefits, or how it plays out in the long run and help them choose a better solution but ultimately, it's them doing the choosing.
At the end, if something is really really required, then it must be the Governments making regulation. This is how it generally works (I'm not saying I like it).