This a list of sites that are hostile to lynx. This can either be by not supporting no-javascript web clients, all the way to blocking Lynx useragents. Work-in-progress, will be changed as new sites are discovered.

• YouTube - YouTube, as with most modern webapps, requires JavaScript. I am yet to find a third-party privacy-respecting client that works with Lynx.
• Axios - Is disrespectful enough to 403 Forbidden you to a redirect page saying 'Enable Javascript and cookies to continue'

• Unherd - Blocks some forms of Lynx User Agents. Pending investigation to what part is triggering it.