We have that issue here, but there's a consumer watchdog set up to catch the people who import these types of things before or very shortly after they hit the shops.
I'm sure there's plenty that still get through, but they're mostly sold at what you might call flea markets etc where there's less likelihood the government will find out where their product comes from.
Fortunately these are the places that are patrolled the most. Some of these products are incredibly dangerous, especially for children. Take the case of
bindi beads as an example.