I've had a fair bit of discussion with folks on and offline about this. If the CSG introduce a rule that all fish shown can be photographed, then it's maybe going to make some folks think twice about benching their fish - I agree with that sentiment - but is a show for the show-ers or for the wider audience? Is a good show measured by the size of the audience or by the number of fish shown? Or the quality of the fish shown? One is put in mind of the episode of "All creatures great and small" where the good village vet is asked to judge the pet show at the local fete and despite the macaw and other fine beasts present, goes for the plain old goldfish as the keeper clearly knows more about his charge than any others there. Our vet is just not on the same point of view and everyone else doesn't get it.
I don't really have a view on photography stressing the fish at shows. I photograph all my fish regularly, but rarely in a photo tank. The latter being a much more stressful experience for them and akin to being benched. I know next to nothing about showing too as some of you have helpfully pointed out.
On thing is certain and that is that more photos will be taken at shows with time as everyone appears to be a photographer these days. I was struck this weekend while attending an Aunt's 80th birthday party that when she cut her birthday cake the whole room went up with cameras. Ones that will take good pics in the conditions, some "point and shoot" digitals and a few camera phones which are mostly poor quality - fine for facebook but not really what you want to put in a family album. The same thing I can see happening at shows. I think I may have picked up a slight sun tan from the exposure.
Something along the lines of a photography half hour or perhaps limit photography to show officials (including sponsors I add with Planet in mind

) might do the trick - but it needs to be a blanket rule and it needs to be well publicised (big signs on the wall) IMO. I like the idea of "no uploads" of any pics taken (to address the control issue which I think people taking this path do have) but I much prefer the idea of putting names there and making any image taken accreditable to (or even IPR of) the owner. Images taken at shows are very noticeable and easily tracked back to any culprit abusing this trust.
So, my end

pence worth is that this business of tiptoeing between individual decisions per exhibit is just going to end in narkiness - and that's to be avoided even if it means an increase in officialdom.
Jools