With a bit of finesse, a squad leader can construct a supply depot on top of a friendly recruited A.I unit who has been ordered to hold position. This often results in the AI being inserted within the cargo containers, safe from most gunfire and unable to see or react to hostiles. This is currently being exploited in Conflict gamemodes to keep friendly AI alive and hidden within base borders to prevent the enemy from building there themselves if it is captured. This is being exploited on official servers, and especially on lightly modded vanilla servers which disable the destructibility of supply depots.
Brute forcing damage with heavy explosives might fatally wound the AI unit if any part of his body is clipping through the depot geometry. Otherwise, a Game Master will need to manually remove the loitering unit.