People really can’t seem to stop doing stuff like this. We collectively know the dangers of introducing new critters, but people just don’t seem to care.
We see that a lot here with folks moving invasive (and non-native) fish into new watersheds all the time. The old fellers (and a disappointing number of young’uns, as well) all seem to think you can just fish the problem away, but it never works. I did the math once, and one person would have had to remove something like 80 fish a day, every single day, to offset the brood of one fish.