No there wouldn't. It'd be Australia and NZ-wide at best. If hasbro really wanted to enforce it, I am sure the threat of pulling their products from BBTS would be more than enough to make BBTS and co back down.
It would suck though as the main reason I buy online is due to the lack of availability over here. Sure paying our prices when compared to O/S sucks, but the main problem is that I see the same toys on shelves for YEARS.