Cheers Nugget!
Now you've answered that question, I've another. If climb or descend is so risky, considering the aforementioned events, why isn't the SOP for collision avoidance simply, veer left or right? If everyone was trained to go left, wouldn't that mean an instant avoidance? Okay, if the aircraft were on converging paths, I see where this would probably not be a good thing, but in those circumstances, your approach speed is way lower.
Bawbag. If ICAO, IATA, whoever, can insist on a standard language, English, in International Aviation, would it be asking too much for a cultural change, with regard to CRM for example? We're probably going off topic here, sorry.