No its, it's not becoming a Nanny State itnanny state. It is a Nanny Statenanny state, and it probably always has been.
Any site that allows a Plutocracyplutocracy of users to edit, close, delete or flag posts based on a set of strictly enforced rules would fit my definition of a web site that is a Nanny Statenanny state.
You may not have ever noticed it because as one of the Nanny's Plutocratsnanny state's plutocrats you probably never run afoul of the Nanny'snanny state's wishes (or if you have it was thousands of posts ago) .
In fact its, it's likely that as a Plutocratplutocrat you often enforced the Nanny'snanny state's wishes.
Honestly, I think anyone who's lamented their closed, deleted or significantly modified post feels the Nannynanny state's much more directly than having a pop up or seeing @user removed from a comment.