I had a two-year period when I battled it out with the black and white stink bombs under the slab of my front porch. I tried smoke bombs, flooding the holes, wire mesh, pouring concrete down the holes, even putting a short cup of antifreeze in the holes to poison them. Nothing worked to discourage their digging in. The division of wildlife was no help. They told me that if I live trapped them, I could not transport them and release anywhere. Animal control said if I live trapped them, they would pick them up, and that turned into a disaster. I caught this big male in a Havahart trap and this guy came out to remove the creature. He told me if he was just calm, the skunk would let him pick up the cage and carry him away and he'd bring my trap back. After getting sprayed the guy chokingly said he was going to leave and get his "bang stick" and be back to put the animal down. They guy never came back and would not return my calls. I wound up levering the trap into my utility trailer and hauling it off to a remote area, and with a long pvc pipe, releasing the critter. Last time I was going to try that.
Not too long after the first episode, another skunk moved in. I decided as with most things involving the Govt., I was better off on my own. I set a leg trap with a hot dog as bait and had my 22 ready. When the wife gave me the elbow in the middle of the night and the smell was obvious, I walked out the front porch and put one in his head at close range. If you hit them right, they "may" not squirt. Single low velocity shot out of a 22, and the neighbors (I asked) never heard a thing. I then put my arm in a garbage bag, bagged the skunk in another garbage bag, and took off for an isolated spot in the boonies holding the bagged skunk out the driver's side window and made a deposit in the dark of night. I don't know what I'd have done if a cop had pulled me over?
This went on for a couple of years and I'd often see a dead skunk in the middle of the road after a rainy night around this area. I wound up trapping and whacking 13 skunks burrowing under my porch, and the digging finally quit. I haven't had a problem here for over 30 years and I always think I knocked off the breeding population in the local area. I never even see one hit in the road anymore.
The bottom line for me was, catchem, killem, get rid of the body. This would probably solve a lot of other issues troubling us today?