Environmental groups such as Sea Piracy like to say what we shouldn't do, but they're usually overidealistic, and hardly ever suggest what we should do instead. Not eating seafood is just not a realistic expectation.
Of course it is. You just don't like the expectation. What we should do is eat waaay less meat and seafood. It takes less land, water, and outside calories to product veggies and beans over meat and fish. Obviously this is not a reality for many people on the planet but it also is a reality for many people on the planet who just choose not to do it.
We are going to end up without seafood eventually anyhow. There's no good solution, global fisheries will continue their collapse as long as we lean on them.