I think that anything that increases younger people into the hobby should not be banned. I personally don't buy the glowing fish, as I assume most of the folks that are on this site wouldn't either. But for a first tank, new to the hobby, that might be enough to draw somebody into the hobby.
If you don't like, then don't buy them.
If you are right in the long run they will stop making them if they don't sell. Companies are out to make a profit, if folks don't buy what they are selling, they will have to sell something else. No need for a government to interfere in free markets.