Hi TnkAgn, Christa from Civil here. We're still improving the system, but so far have seen a dramatic decrease in personal attacks, while there's still plenty of spirited debate and the attacking of ideas—which is exactly what we want to see! 

As for flags, we've included them as a just-in-case fallback. Hopefully they won't be misused; frivolous flagging will decrease a user's trust level.

Our system doesn't take away the need for administrative oversight. It does make administrators' jobs much, much easier, though. Now they can focus on building community, instead of just policing bad behavior.