Another side says well its a meat fishery and if you think of it that way and not as a sport than it isn't really wrong.
But it's not considered just a meat fishery or 'harvest' now is it. Look at all the guys who snag all the other systems after they learned how to do it on sockeye. Look at the reasons guys give to snag. You can take those reasons to ANY river and to ANY species.
Look at the dozens upon dozens of flossing 'fishing reports' on this site. If this is just a meat fishery, what's there to report and WHY post a picture?
To me, this shows that this flossing is almost considered a sport if not more than people admit or say. The longer it goes, the more it will spread. Mark my words. It happens already and it's increasing.
While the choice is yours, and I know you're up-to-date on all the information, Id suggest from my viewpoint and the knowledge that you know this flossing ISNT restricted to the Fraser during sockeye that if you start to floss that you may contribute by being just one more guy doing it.
If you're not part of the solution (making a stand against snagging) then you're part of the problem (encouraging its spread and acceptabilty).
My opinion. I hope you make your own decision.