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[Ridgeback]

Interesting points guys, I should specify that I only used sugar gliders as an example because they are topical on this site. Fully agree wrt brush tails. And uniform licencing. I also agree with Mandas comments regarding the suitability of people to own any living organism.
I think the poaching issue would be a big one in the early days before "pet" supplies increased, but as the animals became more prevalent there would be no value in poaching as the "shelf price" would be lowered by increased availability. Endangered species should remain off-limits, of course.
As for what is ideal and normal, remember that in the last 20 - 30 years, normal things like drink driving and not wearing seatbelts have gone from being normal, to being regarded as stupid.
Yes it would take a lot of education, money, and of course - time. But what an investment it would be for our future.