Twitter thread on drawbacks of Mastodon's federated approach:

https://twitter.com/adrienneleigh/status/850243710973493248

TL;DR— Federation is great, but it kills privacy. If you want private posts, or want to delete posts, all you can do is request a deletion, but other Mastondon/GNUSocial instances don't have to honor that.

Moreover, it kills identity: anyway can be “@you” on some new Mastodon instance.

These problems are intrinsic to Federation, and will not necessarily be easy to fix.

@cdevers wrt the "@you" thing: the way I see it, your "real" identity is "@you@instance" and that's how you should advertise yourself, don't you think?
@jenesuispasgoth Sure, of course -- that's how email addresses work after all, and Mastodon users will need to realize that's part of the package here.