The "worst case" scenario is that people on this instance can follow someone undesirable In my mind, the worst case scenario is what we have for e-mail: 99% of

The "worst case" scenario is that people on this instance can follow someone undesirable In my mind, the worst case scenario is what we have for e-mail: 99% of Mastodon traffic might become spam. Maybe it's easier to control because Mastodon is a subscription model rather than a targeting model (the recipient is in control of what to receive, not the sender), but you only need one user on an instance to subscribe to a spam instance, and the local feed will be inundated. And that's manageable as long as that happens once or twice a day, but the same incentives that almost destroyed e-mail are still there for Mastodon.