To me, any situation that involves a residence, people, or home garden, are the most sensitive. When it comes to crops, there are examples that are ultra sensitive. A misapplication can result in these crops being affected over considerable distances. With these, it is often more difficult to determine where a drift my have come from. When this happens, it is usually the herbicide that gets regulated, rather than enforcement action being taken on some for misuse.
Facet is in the court system now.
Regardless of the outcome of the cases, that is not good. Prior regulations have eliminated 2,4-D as a rice herbicide in many areas. In 2000, calls about potential glyphosate drift were far too common to this specialist. In fact, I had more calls about this than any other topic. It is my understanding that a bordering state has restricted the use of glyphosate by aircraft sprayers during the spring burndown season.