When Left 4 Dead first came out, one of the features they were proud of was a radial mouse menu of chat commands. You could make your character say "Heal me!" or "Tank!" or really any of about 27 things. I think it was intended so players could communicate without breaking character . . . which turned out not to be a high priority. I can't remember seeing anyone use it in a live game.

Anyway, I always thought the bots should respond to those commands, and was always surprised when they didn't.

Then again, the experience with the commandable AIs in Half Life was so profoundly miserable, I thought maybe they couldn't get it working reasonably. After all, when you give a command to a human, there are a lot of contextual clues involved in how to interpret it.