The answers given confirm no one knows what it means. It is a nebulous term often meaning censorship. The question then becomes what type of censorship and who is deciding? So there inevitably will be a political bias. The other more practical meaning is what in the real world are we allowing AI to mechanically alter and what checks and balances are there? Coupled with the first concern it becomes a concern of mechanical real world changes driven by autonomous political bias. The same concerns we have of any person or corporation. But by regulating "safety" one is enforcing a homogeneous centralized mindset that not only influences but controls real world events and will be very hard to change even in a democratic society.