Haven't read through the whole thread (and I am not a rebreather diver), but the two words which march immediately to my mind reading the OP are:
But if you are good enough, and it is not against the law in Sevastopol (is that still part of Russia?), go for it.
Sporting or not sporting? Depends whether you are hunting for fun or hunting for food (and I am guessing the owner of a rebreather has other ways to feed the family). But if you are doing it to put food on the table, I don't buy too much into the "must be sporting" mentality. That doesn't mean I advocate bleach fishing or taking pregnant female lobsters - you need to respect the environment. But if the net result either way is a dead fish/lobster you can eat, I am not sure how much difference it makes in the global scheme of things that you artificially reduced your chances to make it more "sporting" for your quarry.
"Task Loading"
But if you are good enough, and it is not against the law in Sevastopol (is that still part of Russia?), go for it.
Sporting or not sporting? Depends whether you are hunting for fun or hunting for food (and I am guessing the owner of a rebreather has other ways to feed the family). But if you are doing it to put food on the table, I don't buy too much into the "must be sporting" mentality. That doesn't mean I advocate bleach fishing or taking pregnant female lobsters - you need to respect the environment. But if the net result either way is a dead fish/lobster you can eat, I am not sure how much difference it makes in the global scheme of things that you artificially reduced your chances to make it more "sporting" for your quarry.