You can net them recreationally (I do not think recs can leave their net) or commercially (permits required). No limit on croaker and they are in abundance so I am not sure there is anything to really tolerate at this point. They can be sold.
Here is the quote from rwfeer's post "When we got back to the marina the guy on our dock had set a gill net outside of Broad creek and he had over two hundred large croaker in it". In his post he was complaining all HE caught were small croaker not the gill netter. Gill nets can be a PITA sometimes if you are not watching for them but they are genreally just waterman trying to make a living like everybody else.