Apart from the obvious lazy angler who doesn’t care about fish welfare as far as ‘giving them a shock’ treatment blame the TV. There, especially sea game fish in warm climes, fish are often returned in an aggressive manner to get water through the gills.
Now this may well be correct when returning a game sea fish that has given its all and needs reviving. BUT it is one fish at a time and the fish is put back head first not tail first or even worse landing on its side and the lateral line from a great height!
People need to be educated or banned!
I saw a club weigh in on a commercial put 50lb + of carp into a weigh net and onto a skimmer and a roach both around a pound mark! It isn’t just ignorance it is more of an ‘I just don’t give a damn!’ attitude. Fish live in weightless environment. Having 50lb of carp tipped onto them must have been like having ten elephants dumped on top of one of us!