Washington open carry ban
Clayton Cramer has a post on the origins of a Washington state law that makes it illegal to openly carry in cities "under circumstances, and at a time and place that either manifests an intent to intimidate another or that warrants alarm for the safety of other persons." Apparently it was enacted in 1969 out of fear that the Black Panthers were going to come to the capitol while armed. They didn't, but the law remains.
Personally, I think it's probably void for vagueness. I can see the intent to intimidate part as proper, but "warrants alarm for the safety" is not a very clear guideline. If a legislature, dropping the arms part, were to outlaw "any conduct or behavior that warrants alarm for the safety of another," I suspect it'd go down in flames under the void for vagueness doctrine. Warrants in whose eyes? Just what is "alarm"? It doesn't forbid conduct that *does* cause alarm, but conduct that "warrants" such, so that a person could be charged even if nobody got alarmed.