Fishing hobbyists

This thread at an angling website has me nervous. Using Marmorkrebs as live bait seems to be a very poor idea, since the whole point is, well, to introduce the thing into a wild habitat while it's still alive. Admittedly, they're not supposed to get away, but it seems a lot easier for them to get away when they're in a lake or a river than when they're in a tank in your living room.

It's worth nothing that the International Society of Astacology recommended over 20 years ago that governments try to find ways to prevent crayfish from being imported for things like bait.

Again, I invite anyone who knows of these being sold as bait in North American to email me. I just wish to get a sense of how these things are being distributed.