Lots of people consider them trash fish. Lots of other people consider them very good eating. I caught a couple at Bonny this Spring and kept them. I baked one, and it was quite good. From what I've read the objection people have is that they can be tough/chewy when fried. A gentler cooking method seems to be the key.
Drum are excellent eating, as are most warm water game species.
They are the only drum to live in fresh water and are part of a very large family of game fish which includes red drum, weakfish, white bass (salt water), black bass (saltwater), croaker, corbina, and sea trout to name just a few.