Never said that jets flying into busy CTAFs was ideal, my point is if you are doing all of this to lower the risk of repeat occurrences or collisions than its well proven that CTA only has a marginal improvement when it comes to separating Jets from rogue aircraft. Hence why TCAS was invented and mandated, however without having a mandate that all aircraft exposed to the area around jets have Transponders and use them you are just waiting for that rogue aircraft to strike again. The whole Jetstar vs Jabiru incident probably would have never occurred if the Jab had its transponder on, and it had one fitted.