Yes, from hearing that one phrase it does sound far fetched. But haven’t you thought at least once that mobs serve no other purpose than to drop useful stuff, hurt us and annoy us when we can’t go to bed because of them? Well, an update that make mobs “think” for themselves. The mobs would be susceptible to being beaten by an iron sword in the beginning of the world. But as time progressed, monsters would get smart, and try new things like move faster and and try to dodge attacks. From as simple as a zombie picking up his friends remains, to the zombies building a base, and mining and waging wars. Although, there would be few monsters, whom weren’t hostile. These monsters, with the right items, could actually work and help you. To me, and many other people in the Minecraft community want the same thing.
[edited: never include phone numbers and personal information on this site! ~nb]