If you take away their right to decide what to host, they'll just take away their servers from your jurisdiction. Or they'll always limit their userbase to be

If you take away their right to decide what to host, they'll just take away their servers from your jurisdiction. Or they'll always limit their userbase to be below the regulated size. If we're lucky they might opt for federation like email, so that it doesn't break up the ability to reach others easily on other servers. Decentralized hosting is the best solution. The existing right to refuse service is currently only limited by very few laws, like discrimination law and some utility regulations. Taking away the right to refuse service will not work well at all