This sort of thread imprints in people 'that the copilot is always right!'. I never had to make that call as a copilot- a short discussion always did the job with mutual agreement. However, I have known a couple of occasions when a new copilot has called for a go-around, and my response having judged it OK (from the POV of vastly greater experience) has been 'don't be so bloody silly- look and learn!'. There followed in the post mortem a short discussion on how carefully one must assess the situation and not just call go around when it may not be actually necessary. When a proper discussion takes place and the co-pilot can voice his concerns, he has done enough to protect himself. But the danger is very inexperienced copilots will get the idea from this sort of thread that they are infallible and must be obeyed. Try that and get it wrong and they will be nursing a wounded ego!