--It's a no brainer... if in doubt let it go.
--I like to eat fish but realistically how many do you need to keep. I buy some fish.. try to get wild from sustainable stock or closed contained... if one can believe the labels and trust the store.
--If you fish a lot, even with the intent to catch and release, no matter how careful you are not all fish can be successfully released so...where legal to do so I keep some fresh fish to eat. Usually ones that obviously might not survive release are number one priority.
--I often target larger fish thus want to see more of them so why would I keep a 3 lb plus kokanee if they are rare to the lake I'm fishing unless it was critically injured.
--The regs (in my opinion) are not meant to be challenged in court.... they are rules of thumb..which if followed will allow enough fish to survive and safely maintain the population. If people continually push the Grey Areas the regulations will have to become more and more restrictive including closure of the fishery.