Im not a very good technical expert, but I think at the moment there are running 12 Witness-Nodes and they are saving the Network. At the moment they are hosted by developer Tony in the Future it should be de-centralized and you can chose them in your wallet.
So at the moment the Network is not fully decentralized.
This explains why there is no a protection against an eclipse attack, which can be conducted if a naive peer discovery is used (which is the case of Byteball, I noticed this trying to recover byteballs of my friend). In IOTA necessity to talk to people is an anti-Sybil measure. Poor SatoNatomato doesn't understand all these nuances, I suggest to forgive his childishness.
For the record, peer discovery is irrelevant to consensus in Byteball. Even if Sybiled, a node cannot select a wrong branch, by design. The worst that can happen to a node while it is Sybiled, is that the node will stay stuck at some old point on the DAG, as if it were offline. CfB if you want to reply, IOTA thread is not the best place for in-depth discussion of Byteball, post to
https://bitcointalk.org/index.php?topic=1608859.0.