This show just keeps getting worse. And from the looks of it, it seems that we've reached the point in the series, just like in the comics, where Rick has gone so psychotic that even the most minor hint of a threat will cause him to kill that person. In a recent issue of the comics, they found a community of people, and when one of them came along as violent, Rick killed him without batting an eye, and when everybody in the community was shocked, he looked at them casually, just slightly confused, and asked "What?". Yeah, it's just plain bad and the show's going that way fast.
It's ironic when Lori, the worst character in season 2, has become likeable while Rick goes low on it. Then there's Carl, too. In anything horror, the death of a child upsets me and shocks me. But honestly, I would not mind if Carl got munched up or anything, because he's the most irritating character in the show. He's every "Annoying Little Brat" cliche rolled up into one annoying little jerk.