Since AI is supposed to mean Artificial Intelligence you would think things like that would not happen. But somebody forgot to tell Microsoft that. So AI in FS9 has no brains at all they will go where they want to and if you are in there way oh well they will just completely ignore you. The one I like the best is when you are on final approach just about to land when a 747 flies right through you and lands ahead of you than ATC has the gall to tell you to abort landing. I say up yours and land anyway ;)
ya, thats happened to me, except what happens is that there will be a Cessna that lands and taxis off the runway going 15 knots. Ultimately ending up in me having to go around and redo the approach, sometimes they will still be there. I'll finally land because im sick of it and i know that in real life they'd be off the runway, so i take my 737 right up that cessnas arse.
EDIT- I can actually remember another time when I was on IFR from Lubbock to Dallas Love (737), I did everything they asked me to, they were lining me up for approach for 17. Then out of nowhere ATC tells me my IFRs been canceled. THAT, made me mad. lol