“Maybe. But we’ve also seen some evidence that the zombies can perform basic functions, like opening doors. In the pilot or maybe second episode—I can’t remember which—Morgan’s zombie wife tries to open the door to their house, which was locked. In the episode when Andrea was attacked in the RV, the door was shut and the zombie got in. “
Still can’t buy it. Zombies are not stealthy. I think you would hear one trying to work the knob. They also tend to shuffle their feet when they walk, and when they see the living they moan. How can you miss that in a quiet house especially when on high alert?
As for not letting in new people I think its not just about trust. I think Rick doesnt want to be responsible for more people who might get killed. They are quite a formidable group. A delusional leader, his tween son, 2 females who barely know how to shoot, the wannabe badazz sexpot, her somewhat capable lover, a crippled old guy, and a truly capable fighter. The addition of sword girl and the 1 armed badazz does improve things, but they might just kill each other.
Perhaps. But it wouldn't be the first time that someone has bought it because of a sneaky zombie. Remember how Dale got it?
Also, with respect to the other comment about how people walk around like it's Sunday in the park, I think that there is some realism to that, at least to a degree. These people have been in Zombie world for at least a year. For the most part, they have figured out how to take care of the zombies. They are no longer the main threat. With that attitude, people get complacent. And then people make mistakes.
You raise an interesting point about Rick. [Comic spoiler alert--highlight below to read]
In the comics, Rick "resigns" as leader, basically for that same reason. I wonder if they'll go that route on the show?