http://zzzmirror.i2p/topics/3425-the-dire-state-of-zzz-i2p-forum-ratelimiting
Now, a service like I2P shouldn't be moderated or controlled, but the destination owner can and (probably) should control the content of their own destination. Freenet kinda fixes this with WOT which at least proves the identity of a board member as human but im sure spam is still a problem.