The next big hurdles for mastodon are:
1. Account migration taking followers to the new instance
2. Harassment mitigation - some block list / heuristic filter subscription model?
3. Impersonation prevention

@zauberlaus There is already an export/import function for blocked users, I'm sure the blacklists will follow soon!

I'm guessing there's not much use for it yet, it's hardly a priority...

@anarschtroumpf Blacklisting is not sufficient as we see on twitter. Harassers create a lot of new accounts to circumvent this. What is needed is an interface for a filter function that can take everything into account. Username, user creation Date, timezone, number of toots, followers, followings, toot content, time ...