This is good to know. However, this still requires the witnesses to be active and somehow cooperate in some form of moderation and enforcement of consensus rules. So the question is - do they? And how can we tell, aside from state of the witness posts?
The witnesses cooperate and come to consensus by running the same or a compatible version of the software. That is very visible on steemd.com.
As far as moderation that is the job of the community (especially of those with a big stake due to the disparity in token distribution) but it is not a function of a witness per say.