[bovitclan]

I don't mean to be a downer, but you could certainly cause an accident by calling out an observation which was faulty. I agree with the sentiment that you should speak up when you see something amiss, but let's not kid ourselves that, like every decision, it comes with inherent risk.

[mckoss]

Making an aircraft go-around can never cause an accident - the missed approach path for any landing aircraft is always kept clear.