Originally Posted by sekan
Is it just me or can you walk through walking people?
You can, since the random nameless people roaming around who you can't select aren't technically NPCs, they are a special "crowd" object that runs a number of dummy people who move around to make the area seem busy.
Since they aren't NPC/creature objects but rather just visual effects they have no collision detection or pathfinding. As such they are unaware of your presence, and you can walk right through them.
I guess things are made this way to reduce the load on the game engine. Pathfinding and AI are quite expensive for processing.