They are an invasive species because they did not evolve there. They are destroying native species that lived there long before their 'ancestors' did. Burmese pythons, iguanas, and other reptiles that do not originate from Florida are a real problem, and while I don't agree with culling the animals, there's only so much the government can do. Can't really relate people politics to animals in this.
ANYWAYS, back to the actual discussion: I'm going to my first expo in June and I'm hoping so badly there's old world colubrids for me to drool over. I highly doubt it, since I live far away from any major breeders of that sort, but one can dream!