Black Ops pulled them off quite well I thought as the CLAW's were slow and had a terrible turning circle and were mainly used as defensive objects because the armour they used so really I did not find it that bad and the weapons didnt even closly resemble those to an AFV or APC. And when ever one was in the game it would be instantly noticed and targeted by you and the AI so really I did not find it to unrealistic and I liked Black Ops's use of the armed Quadrator which are actually possible and actually been made but not by the military yet. And back to the CLAW as it is not seen as being intelligent it is a slow dumb mobile turret in the game that is used to take action of troops to allow them to get into cover and for support and to hide behind for cover. So really I don't find Black Ops to unrealistic in the UGV and UAV area. But thats just me and I think my post came out abit wrong as I was sort of just saying they could of added more UAV's and UGV's I didnt want to turn it into a game war... Heres proof of quadrators made aswell