If they follow the cannon of the book, they haven't really so far, but the group doesn't really get their E36 M3 together until they make it to the self sustained (solar) walled off community in the D.C. burbs. However, they meet a new protagonist that makes the Governor look like a cream puff. Talk about dragging a story arc on forever though...
In the books they kind of fruitlessly try to make a go at it in the prison and the Governor ruins their plans/hard work kind of like the way the show has been progressing and what next weeks mid-season finally previews suggest is going to happen.
I've taken some of the show too seriously, have vocalized a "come on!" or "really?!?!" a time or two, but I mostly try to just enjoy the fiction for what it is, fictional entertainment.
The last thing I'd be driving is a tank that get's ~10 gallons per mile. There have been plenty of multifuel Duce & 1/2 and 5 tons setting around that I'd be using when I could for supply runs. You aren't going to high-center one of those on a pile of greasy zombie corpses.
Further more, sanitation, everyone is always covered with goo, blood, and brains. Faces, in their mouths, eyes, ect. I'd be in riot armor with a face shield anytime I was on a supply run or patrolling the wall, and use soap occasionally.
Set up some real area-denial traps/obstacles around the perimeter for cripes sake. You can't tell me there's not a back hoe in the area and someone that has a clue how to use it in the group, a trench around the perimeter, and fall some of those trees in the woods, make some obstacles to funnel the walkers where you can keep them off of that, for some reason, supper flimsy chain link. Some of my gardening efforts would be going into hedgerows outside of the fence too, they were pretty effective in WWII, I think they could handle some slow moving decaying walkers.
My biggest "come-on!" moment was the "raining zombies" scene fist of this season. That was the best stocked post apocalypse grocery store in any dystopian story I've read or seen. How long had walkers been on that roof? Alcoholic dude breathes on that liquor shelf and it falls on him, then the walkers start randomly falling through the roof?
I still watch it, almost religiously, I'm about 4 months behind on the graphic novel, and prefer the story line, character development/roles in the books over the television show.