I believe them. I've read about these types of old laws for years now, always silly but good for a laugh. There's even a legal term for old unenforced laws, but I can't remember it.
What caught my eye was the one that you can't have a concealed weapon over 6 feet long in Seattle. Damn, now I'm going to have to leave my .50 cal. Barrett with the 6 foot barrel at home instead of under my coat when I go to Seattle.