If a conservation group set up some trail magic to discuss LNT with hikers or a trail maintenance group set up some trail magic to recruit volunteers, would we be discussing if it was OK? The point is I don’t think it is automatically right or wrong because they are offering spiritual guidance along with coffee and donuts as long as they do it in a way that does not detract from the experience of those who don’t want to be guided.
I agree that there are far better venues for this sort of activity than the trail. Among the homeless, victims of domestic violence and county detox facilities come immediately to mind. Maybe someone should point that out to the people who are doing this?