Flossing, lining, whatever you want to call it, you aren't actually catching the fish (it doesn't willingly take the "bait"). While it may be a "gray area" in some people's minds, you can be written a citation for keeping a fish caught that way if it is hooked OUTSIDE of the mouth. However, it is pretty rare to see a citation written for it, especially at a place like Blue Creek. What it really boils down to is personal ethics - and that is your own decision.