Neil, I think the 'could be's and 'might's', which seems to be the basis of the logic behind your views on the probable outcome of night fishing for barbel....are at odds with the facts of what actually happens. The facts are that on all the rivers that I am aware of locally where that black and arcane practice is carried out, the 'welfare of the water' does not seem to have suffered one jot. Certainly on the river I spend my time on, the fish themselves are bigger than ever, and so apparently healthier, and in all the years I have fished for them have shown no signs whatsoever of 'upping sticks'. I dare say if you ask all the other anglers throughout the country who carry on in this deplorable manner, you may find a similar situation exists. Excepting those ravaged by deteriorating water quality and/or otters and foreign nationals fishing for the pot and/or profit of course.....
Thinking about it, I suppose you possibly COULD convince them to 'up sticks' or cause the 'welfare of the water' to suffer....if you fished for them during the day. Because then of course, you would not be fishing for them in the open, where they naturally feed....you would be fishing for them in their safe havens, the cover to which they retreat during daylight hours in order to hide from the perceived or race memory of the threat from above...and from otters. Yes....I can see that might work
When you say "Are we of the opinion that if we pursue our quarry to the extent that we snag fish for them on small rivers where there is little chance of landing them, and add to that night fishing?"....I am not entirely sure what rexactly that means. However, taking a stab in the dark, as it were, I assume you are asking whether I feel that snag fishing in small rivers, with little chance of landing fish....and night fishing...are ethical practices. I have already stated my views on night fishing. As to the other point...I can't imagine why anyone would deliberately do that, because there would be absolutely no point in hooking a fish you had little chance of landing...but yes, it would in my view be entirely unethical. I have certainly never done it, but then, I tend to fish at night, when there would be no reason to do that....
Fact is Neil, we all have our view and opinions on things, and I feel that is good...it's how things should be, we should all state our views on things and debate issues. What is NOT good, in my opinion, is seeking to impose those views on other people. But, that's just me mate. Do you see my point?
If you wish Neil, I will send you pictures of my latest 'night caught' brace from my little river, with the assurance that 'no fish were injured during the making of this film'
Take it easy mate, it's only fishing
Cheers, Dave.