That's exactly how I feel too.
If it's outside my yard or walking down the street fine and dandy...If it's in my yard, it's a predator and it's skull will meet Mr. Shovel and said predator won't be coming back for a repeat visit.
That's a heck of an attitude for animal control...
On the other BYC, there's a person called FoxTrapperSteph...they might be able to help you trap your fox.