I believe that a bite from most any venomous snake is far more likely to kill someone than a bite from a dog is. There are just far fewer opportunities to be bitten by venomous snakes then there are to be bitten by a dog. If everybody had Gabon vipers instead of dogs there would probably be equivalent numbers of bites.
I do know some peeps who choose to keep venomous snakes responsibly and law abidingly (with permits from their respective states) and I would hate to see their collections taken away. I believe that naturalization is a minor issue compared to other environmental stresses but it is probably still a legitimate cause for concern with some species. Not necessarily all boas/pythons but at least some colubrids like BTS.
I think that in any case where there is a threat to human health/life the government should be somewhat involved in deciding who can keep this animal and who can't or at least maintain a national registry of people who are keeping them. I know that most people will just go about their business and not get a permit or declare that they own the animals but anyone who has legitimate care for their collection of whatever they decide to keep, should be the ones who abide to the law.
If the big names in the reptile industry lead with good examples, the rest will follow. Requiring that purchasers have proof of where they live and proof of a permit would make a huge difference in the number of escaped/released animals.
If regulating the trade in these species is what it takes to prevent more ecological damage to the environment and threat to "innocents" (those not involved in the keeping of the animals, a person who owns venomous snakes can get bitten and die but if one of his animals escapes and bites the next door neighbours' kid, that is a true issue). Then steps should be taken to regulate who exactly owns these species.
Note that I have avoided using the word "ban", most of these laws rely to heavily on banning species and not just regulating who owns them.
Also, for those interested in the history of the reptile industry. If you have not read "the lizard king" and "stolen world" you should. Both very good books on large reptile companies that engaged in smuggling of endangered species, an ecological sin as great as the naturalized species in the southern US. Nothing to do with these issues but they can provide good perspective for the issues that are facing the reptile industry/hobby today.
Sorry for the long post and excuse any grammatical or spelling errors. I just think that if reptile owners get really involved in local and national politics they can make a difference in how the system works.