Thanks for the input. The business end doesn't care, nor do the directors generally, except for wanting to maintain good relations with the AEA office. They want no misunderstanding that the actor is there on his own, was not asked to attend, and no expectation of attendance was implied. I don't want gossip that the company "makes" the GAs come in pre-contract, because we don't. But I don't kick them out if they show up. (But they are NEVER on the schedule, so never asked to rehearse.)
It's usually just an "introduce yourself" type thing and the actor leaves when we start rehearsing, or just watches awhile.