Instead, I made CSS Naked Day participation opt-in with a new a query parameter to the URLs: Just add ?sandbox=broken to the end of any URL on seirdy.one. This query parameter sets a maximally-restrictive Content-Security-Policy header, instructing your browser to block CSS, images, media, and more from loading. The only thing that the CSP will allow is submitting forms (Webmentions). See my CSP Bug Reproduction page for other values you can give the sandbox parameter on seirdy.one and its On...
