I'm not american nor live in the US, so whatever the FDA does is technically none of my business.
Foreign suppliers will probably not comply but just mis-label products leading to dangerous situations. We've seen the powerful lasers with '1 mW' stickers attached just to pass customs. This can be very dangerous if someone assumes the label to be correct and starts waving the thing around for a presentation etc.
In Europe things often work a bit differently. A high power laser is not allowed to be sold a consumer device since it would be dangerous in that application. Selling it labeled for it's actual purpose is no problem though, it would be something like a subcomponent for a laser cutter, or high-energy light source for research. This is all fine as long as it's perfectly clear it is NOT a product to be used as a presentation pointer or in other applications where you would shine people in the face with it.
Then again european legislation is more based on intent than on what means you use. It would be very illegal do, for example, throw baking flour from an overpass to blind drivers, and it would be illegal to use a laser pointer to do the same thing.
The solution here is not to ban flour or lasers, but to prosecute the people using them to endanger others.
There have been a few cases of idiots throwing bricks from overpasses onto traffic below. The response was not to ban bricks, but to indentify these people and convict them of attempted manslaughter - rightfully so i think.