I don't think personally that there would be too many issues with exotics coming into the country, I don't see why they should be sterilised or even Quarantined.
Whilst I agree there maybe more risk of disease from Wild Caught snakes from abroad, even then it is minimal.
I think the cautious way to go would be to allow in captive bred exotic's from respected countries and breeders, this way the quality of the animals can be monitored.
Reptiles as you know have been imported into Europe and the USA for many years, I myself imported animals from Malaysia,Europe, Africa and the USA, I never had any major probs with disease, just a few mites, ticks and worms, as you would find on any Australian WC snake.
I have personally not ever had any IBD and have only heard of a very few amount of isolated cases in Europe.
I do think that the greater issue would be to get the Authorites to go along with all the extra paperwork involved in registration etc...
I do also think that the exotic venomous species should be held only by the most experienced and that they should also make provision for the anti-venom to be made available,should the need arise
Having said all that, I am quite happy at the species available to me out here at the moment, well until the rules change, and then I might have a change of heart!
Neil