>How did the Internet get along so far without it, if it's really needed?
By each individual site expending a great deal of effort to identify their users. Or by offloading it to someone else expending a great deal of effort like putting their site behind Cloudflare or restricting e-mails to legit providers.
> By each individual site expending a great deal of effort to identify their users.
Very few sites are putting in any significant effort to identify their users. Those largely predatory sites shouldn't be setting policy for the entire web.
By each individual site expending a great deal of effort to identify their users. Or by offloading it to someone else expending a great deal of effort like putting their site behind Cloudflare or restricting e-mails to legit providers.