An aircraft "instructing" another to do something is a bad idea.
I vaguely remember attending a CASA roadshow years ago where they played a short audio clip. It was of a Dash-8 launching out of somewhere with traffic already in the circuit or on approach. The Dash took off having never quite worked out where the traffic was and demanded the other traffic climb or turn (can't remember which). It was by shear luck that they didn't hit.