i'm surprised they haven't stung anyone yet. or they chop off their tails? I'm guessing not if they're released alive right?
I still have doubts on how well they do after they are released. the accumulation from the lactic acid may not be apparent initially, but the battle, and held down., could lead to internal organ hemorrhage or worse.
try stringing your pet s.a. ray to a rope for several hours, and pull it around the tank against its will., see how well it does after. and remember, these fish are hundred times bigger, which means more work to try to break free. i'm skeptical.
catch and release sounds noble, but in reality its less