I watched most of the stream (there's just something so soothing about Cory's voice that I kept falling asleep). Living in Hawaii, I'm used to heavy restrictions on what can be brought in. Pretty much if you don't see it in a fish store you have to have it imported, which means it has to be on the 'okay to be brought in' list put out by the department of agriculture. We have so many endangered/protected species here, it makes sense to protect our environment. I'd like to have a tarantula, boa, ferret or oddball fish but not at the expense of the local environment.
Should this be handled at the federal level? Maybe yes, maybe no. Yes - if everyone's following the same rules there's less confusion. No - an escaped (or worse, released) critter might not be able to survive/reproduce in different areas so setting a blanket rule might be overkill.
What would be better than any kind of legislation? Education and impressing responsibility on creature keepers. Of course, that means that people have to take responsibility for themselves and we know how how well that works.