Actually it wouldn't be hard. The problem is we're stuck with using Lua. Without integrating it with Toribash itself, we can't do anything much.
Check the Lua Scripts forum for an attempt by tripwire to introduce neural nets. It's better than my old attempts, which ended up with nothing well. The current ukebot.lua distributed with TB is done by me, and was a very primitive attempt at something like AI, but it's not good at all.