The first part of this NOAA bulletin is directed toward aggressive behavior of the Sea Lions/seals, when on docks, swim steps, and property. The second part (where there is more aggressive action allowed by the human--such as rubber bullets, or sabot rounds)--I would think present several issues.
I also would suspect that LEO in various states/counties would have different interpretation of the guidelines depending on the local laws.
Just to be clear, I am not starting a discussion of guns on boats--but just pointing out that there are some questionable areas in this NOAA guideline.
In Florida is is permissible (but may not be socially advisable) for anyone to open carry a loaded firearm while on the way to hunting or fishing, as well as when in the action of hunting or fishing. If you are a concealed carry Permit holder, then you can basically carry loaded at any time, except in prohibited areas. My recollection is that in California that type of activity was OK 60 years ago--but no longer….As I understand it now there are far more restrictions--involving specific type of area the gun must be unloaded (perhaps except in un-unincorporated area.) But if you pull out that 410 or 45 colt, even with a Sabot or rubber bullet there are going to be some repercussions in many areas. I think if you were packing a weapon such as a .410/Colt 45 "Judge" or imitators loaded with either rubber bullets or sabot rounds, that both game wardens and local LEO would take a dim view under today's rules. (I don't have a good knowledge of Oregon or WA laws, and it has been over 20 years since I lived in Calif.)