Whilst he was in his physical body, maintaining such standards was fairly straightforward. He could either approve or disapprove of any specific actions.
Since his passing in 2011, every teacher who was his direct disciple has been left to monitor themselves. Whilst teachers generally want to do the right thing by their students or disciples, people are fallible and mistakes do happen. The experience of other lineages and schools that have faced a similar situation, shows that a lack of clear accountability leads to a greater prevalence of errors and difficulties. If these are not nipped in the bud, then the abuse or misuse of spiritual authority can follow.