That stuff kinda turned "urban legend" here. Game and wildlife thought they would wipe out the LMB population, but it's kinda the opposite. I can catch a large bass and snakehead on the same bank, just by swapping bait.
At first they were having us leave on the bank, but SH can live for days as long as the scales stay moist (they gulp air), but now we just aren't allowed to transport them live, so catch and release, or consumption is suggested.