Interesting times. I'm starting to see bits and pieces of Twitter-style spam on here.
Advocates for the federated model believe the improved moderator/user ratio will keep things from getting out of hand. I'm on the fence.
Until now, the lack of spam has been mostly a result of this being a niche, obscure, tiny part of the Internet. Spamming it wasn't worth the effort.
As the Fediverse grows, theories will be tested! Fingers crossed.