I know what you mean. I read the first few pages then just looked for the posts by the original poster to see what was happening.
I have a few silencers that I bring to the local range in WA at times. I do not use them on firearms there, but use them as conversation pieces. I have only had one person tell me they were not legal, but he reversed his position when I explained how it was registered.
There are a few law enforcement that go there to practice with their issued machine guns and they have asked try out my silencers a few times. While the AG says the law applies to everyone in WA, the police say they are exempt from prosecution, so I am a bit torn on whether or not to let them try them out. I do not want to go to the trouble of flying with them out of state to use only to find I am getting baffles strikes.