The best part of the fediverse is that anyone can run their own server. The downside of this is that anyone can easily create hordes of fake accounts, as I will now demonstrate.
Fighting fake accounts is hard and most implementations do not currently have an effective way of filtering out fake accounts. I’m sure that the developers will step in if this becomes a bigger problem. Until then, remember that votes are just a number.
I would imagine this is the same with bans I imagine there will be a future reputation watchdog set of servers which might be used over this whole everyone follows the same modlog. The concept of trust everyone out of the gate seems a little naive