I think this is going to be one of those complicated "It depends" kind of thing.  I've done it twice so far with Jane's Luna in order to just speed things along and avoid posts that were pretty much "And he waited around until it was time to move onto the next place", and Jane said she was fine the first time I did it.  I think there's a certain leeway for posts that save time, maintain narrative flow and keep things interesting without causing any real waves.  Bigger stuff I would assume is a no-go, not without some talking before hand and people working together to arrange the scene.<br/><br/>That's just my two cents.  However, if I was interacting with someone who was strictly "No, not at all under any circumstance", then I would default to that.  While expedience is nice, I wouldn't put expedience over the comfort of a fellow player.