I should mention here that I am in 100%, wholehearted and total agreement with Barry Rice in that pristine forests, waterways, and natural habitats should remain pure of their original ecosystems and biosphere. I would never attempt or recommend introducing these plants into such places; those sites that contain native CP, ferns and orchids, are in my view "sacred grounds", and altering them in any way is a sacrilege.
However, there is a case to be made for farming these plants in areas that have already been cleared for development, just like any other farmer who grows crops that originate elsewhere.
The fears and concerns that they may go feral, and become yet another noxious invasive exotic, reeking havoc with the indigenous species, is in my opinion greatly overrated and unfounded. Observing them in this site over the last eight years or so, and how they only occupy a very specific and narrow niche, and nothing else, leads me to believe that even if some birds were to consume some seed of this, or managed to transport a few strands to another more pristine site, those Aldrovanda strands would most likely either go into decline and die off if ALL their requirements are not fully satisfied, OR, they would find themselves restricted to those few isolated places where they are satisfied, and still be a pretty rare find. They quickly go into decline if they drift off into deeper waters, or more shaded conditions where the temperature drops below their optimal range.