Ethel,
What were the circumstances of the 4 near-hits?
When did you last attempt to spot a needlenose 737, opposite direction, closing on you at half a kilometre a second?
What investigation course did you do that has made you conclude that a Tobago pilot, using 2 degrees separation, had made a good operational and safe decision? Get a grip on yourself. Had that 737 been a couple of hundred feet laterally displaced, the tobago driver wouldn't have noticed, and wouldn't have been able to do anything about it. It was pure luck that they weren't in the same piece of sky.
By the way, ALL pilots learnt to fly in busy training areas, so you're not a hero. And most pilots today wouldn't bat an eyelid about flying in one of them now. But buzzing around a training area amoungst a bunch of Cesspits is a tad different to the issues being discussed here. If you can't appreciate that, your'e way out of your depth, sunshine.