When needs must. Not really sure what you were getting at with the exams quip... True 'we' do control and kill all manner of animals and I can understand killing off animals that cause real risk of disease or harm if it is done as humanely as possible. But foxes don't, in my opinion (and I should imagine it is an opinion shared by anyone with anything above a very base moral standard), cause enough of a risk to be killed at will. To kill an animal for shitting and mucking about with bins is obviously barbaric and meat headed. This aside the way that you have approached what is to me, and I should imagine many others, a serious topic so obnoxiously and arrogantly sickens me. If it is ok for you to kill something for 'shitting' I bloody well hope someone gives you a clump for the massive steamers that are coming out of your mouth.