I'd hardly call pulling pin whiting out 3 at a time and then returning them only to see them washed up dead by your feet an act of sportsmanship, but to the majority of anglers on here this describes their winter fishingTouche! Wondered if a fellow pedant would pick that up!
Ok, haven't done a survey. I simply would argue that killing / maiming fish in this way is so antipathetic to the principles of sportsmanship underlying angling that no-one I call an angler would be likely to approve.
Most anglers no longer use gaffs, though many used to. Why? Because we no longer think it right to stick a metal bar through a fish's body.
Again; spearfishers are entitled to do as they wish. I just say that such a forum does not belong on an angling site.