It would be nice to have a non-lethal option in such a situation available so that resort to lethal force could be avoided. Unfortunately, most of these options are only available to police agencies. However, it seems to me that a large 16 oz. can of bear spray might generate enough widespread discomfort to convince some of the instigators to go burn down someone else's property. Of course, it could generate the opposite result making lethal force necessary. From a legal point of view, it seems like an attempt to use non-lethal force would go a long way toward absolving the homeowner from liability.