My comments were solely directed towards those whose knee-jerk reaction was to call this a clear act of deliberate censorship[1] or "Soviet-style oppression" (in another comment chain). If you don't agree with those comments, then I don't intend to go so far out of the way to convince you of why rules exist and are enforced in the way that they are. Beyond that, I agree with pretty much everything you said in this comment.
[1] I decided to add the word deliberate here because this may be the source of some confusion in my comments. Many comments suggest that the intent is to cover up support for Snowden specifically. I believe this to have no known factual basis. If on the other hand, you consider this, and the policies which allow it, to be a general act of censorship on public art etc. then that is open to debate– I would tend to agree with it, and am happily writing to the Parks dept. today to say as much.
[1] I decided to add the word deliberate here because this may be the source of some confusion in my comments. Many comments suggest that the intent is to cover up support for Snowden specifically. I believe this to have no known factual basis. If on the other hand, you consider this, and the policies which allow it, to be a general act of censorship on public art etc. then that is open to debate– I would tend to agree with it, and am happily writing to the Parks dept. today to say as much.