Friendly AI at bases seem to wander about oblivious to the danger of moving vehicles. Even if you use the horn to move them out the way they often run straight back two seconds later and get run over.
Enemy AI actually behave realistically here, as they will always move out of the way of moving vehicles, (and shoot at the obviously).
They need their code updated so they are aware of any vehicle that is being driven and move out the way properly, like enemy AI do.