Originally Posted by RobtMyers
The zombie that got Lee might as well have been a snake, there's a reason they're reviled in every culture as evil and dangerous. And it's established in the comics, show and game that walkers can get "bored" and just sit quietly somewhere until something stirs them into activity.
If it's obvious to someone at home, it's certainly going to be obvious to someone that's been living in that environment for months on end.
Incidentally, I actually worked with venomous animals (snakes included) as a hobby until I moved. One of the very first rules for anybody who lives in an area with them? Always be careful around potential cover sites. I have trouble believing people wouldn't adopt similar rules for zombies.
Hell, just out of habit I still shake out my boots before putting them on even though the American Northeast isn't exactly known for being scorpion country.