There are lots of unclipped springers released from upper columbia hactcheries ,like Lyons Ferry,though they are marked in different ways that are hard to see visibly, so they can tell they're of hatchery origin,,and yes, they want as many of them to make it back upriver as possible.
As for squaxin is., think of all the people that have been hammering on them coho by the time they make it back to the pens,probably why they get so lock jawed.