I see our local schools regularly circling to position on a different runway. It is a three runway field. Last weekend it was being done through necessity as the wind was periodically swinging 90 degrees. Good practice!
If confused, or the circuit is getting congested, clearing the circuit is absolutely the correct thing to do.
Orbiting at a controlled field is OK but a no no at an uncontrolled field as you could be orbiting into the path the following aircraft.
Back to the origional post I would say usually yes but I would want to know the pilot reasonably well and make my judgement based on personality.
D.O.