Uncaught SecurityError: Failed to read the 'localStorage' property from 'Window': Access is denied for this document. I feel like this happens on the majority

Uncaught SecurityError: Failed to read the 'localStorage' property from 'Window': Access is denied for this document. I feel like this happens on the majority of the demos on the HN frontpage too. I just tried searching for what percentage of users disable cookies, and it seems like ~10% is a common figure. (Though I got numbers as low a ~1%, and a lot of confusion about third-party cookies.) I know this isn't technically a cookie, but I think most of the major browser vendors lump it under the same preference. Anyways, hackers and demo writers: degrade gracefully. On first brush with your random website, I might not want to let you track me. (I don't know what you're using this for.) Show me value. Or at least tell me why you need this.