Personally I think not having karma limits is nice currently! I understand why they were used but grinding karma as a lurker on reddit was frustrating.
As a new community we need to identify and stamp out bad actors immediately and thoroughly (spammers, selfservers, ads disguised as posts, brigading, illegal content, racism, you get the idea).
We canโt control if they create their own instances, but we can isolate them.
If Lemmy truly catches on we probably canโt totally prevent an Eternal September, but I do hope we go a long way to staving it off.