Rough? Dont ppl catch them to eat? Why waste? If there not going to eat it they should thow it back! Theres someone always willing to eat a fish, no matter what the species, another persons trash is someone elses dinner. So called trash fish are part of a balanced eco system.
(channel cats are not a species out of places or introduced ussally - but a part of the system)

As for skinning them alive [] ...so what? Im sure they have pain receptors too. Do they mercy kill a lobster or clam, oyster before boiling him to death, to be more humain?

Im sure they( fish) dont knock each other out or drug each other before they eat each other?

Being human/humain is overrated.