Melbourn12, have you heard of "SSS"?
(Shoot, Shovel and Shut up)
Don't know whether you're allowed any firearm which would effectively take out a fox.
They passed the same sort of protection for beaver around here in MA. Now they're creating flood plains and ponds where there were once homes, yards, farm lands, pastures, roads, playgrounds, and parking lots.
According to DH:
What is the only poison that is safe and effective for coyote, beaver and fox, which won't harm pets or other wildlife? Lead poison
How far do you need to relocate such nuisance wildlife to ensure it won't return, yet not cause it or anyone else any suffering? 4 feet (underground)
Foxes, in my experience, are so incredibly smart and wary of people. They become so accustomed to us, they can live and move around our properties, fearlessly. They are notoriously untrappable. They can become boldly aggressive toward people, as well.
Pity, short-sighted conservationists sometimes do more harm to nature than good.